MILWAUKEE, Aug 14 (Reuters) - Wisconsin Governor Scott Walker activated the National Guard on Sunday to assist should further riots erupt in Milwaukee over the police killing of an armed suspect in a predominantly black neighborhood.  The Sherman Park neighborhood, which has a reputation for poverty and crime, appeared calm at midday on Sunday after businesses were burned, cars set ablaze and gunshots fired by demonstrators angered by the police killing.  Police presence in the area was low with some residents milling around and others cleaning up debris.  Walker announced the action after a request from Milwaukee County Sheriff David Clarke, nationally known as a conservative voice in Republican politics, who met with Walker and Wisconsin National Guard Adjutant General Donald Dunbar.  Walker said the Guard would be "in a position to aid local law enforcement upon request."  A police car with broken windows is seen in a photograph released by the Milwaukee Police Department after disturbances following the police shooting of a man in Milwaukee, Wisconsin, U.S. August 13, 2016. Milwaukee Police/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY. TPX IMAGES OF THE DAY  An overturned bus shelter lies on the ground after dozens of people protested following the fatal shooting of a man in Milwaukee, Saturday, Aug. 13, 2016. A crowd of protesters skirmished with police Saturday night in the Milwaukee neighborhood where an officer shot and killed a man after a traffic stop and foot chase earlier in the day, setting fire to a police car and torching a gas station. (AP Photo/Gretchen Ehlke)  Authorities respond near a burning gas station as dozens of people protest following the fatal shooting of a man in Milwaukee, Saturday, Aug. 13, 2016. A crowd of protesters skirmished with police Saturday night in the Milwaukee neighborhood where an officer shot and killed a man after a traffic stop and foot chase earlier in the day, setting fire to a police car and torching a gas station. (AP Photo/Gretchen Ehlke)  Police advance toward protesters during disturbances following the police shooting of a man in Milwaukee, Wisconsin, U.S. August 14, 2016. REUTERS/Aaron P. Bernstein  MILWAUKEE, WISCONSIN, USA - AUGUST 14: Police officers try to keep away protesters from the area as they construct barricade near the damaged gas station during a protest held for Sylville Smith, who was shot and killed by a police officer as he reportedly attempted to flee after he was pulled over by police during a traffic stop Saturday afternoon, in Wisconsin, Milwaukee, USA on August 14, 2016. (Photo by Bilgin S. Sasmaz/Anadolu Agency/Getty Images)  MILWAUKEE, WISCONSIN, USA - AUGUST 14: Police officers try to keep away protesters from the area as they construct barricade near the damaged gas station during a protest held for Sylville Smith, who was shot and killed by a police officer as he reportedly attempted to flee after he was pulled over by police during a traffic stop Saturday afternoon, in Wisconsin, Milwaukee, USA on August 14, 2016. (Photo by Bilgin S. Sasmaz/Anadolu Agency/Getty Images)  MILWAUKEE, WISCONSIN, USA - AUGUST 14: A protester stands against police officers during a protest held for Sylville Smith, who was shot and killed by a police officer as he reportedly attempted to flee after he was pulled over by police during a traffic stop Saturday afternoon, in Wisconsin, Milwaukee, USA on August 14, 2016. (Photo by Bilgin S. Sasmaz/Anadolu Agency/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police officers stand guard at the District 7 police station as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Crowds takes to the streets near the District 7 police station, protesting for a second night after an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Crowds gather near the BP gas station that was burned, protesting for a second night after an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police in riot gear line up as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Men throw rocks as an angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. There was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police in riot gear line up as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police take a man to a hospital after he was shot in the neck as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police take a man to a hospital after he was shot in the neck as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police take a man to a hospital after he was shot in the neck as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  MILWAUKEE, WI - AUGUST 14: Police in riot gear line up as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)  Police violence against black men and women also has sparked intermittent, sometimes violent protests in U.S. cities from Ferguson, Baltimore, New York, Baton Rouge, Louisiana, and St. Anthony, Minnesota, in the past two years.  The outrage has given rise to the Black Lives Matter movement and touched off a national debate over race and policing in the United States.  The trouble started on Saturday afternoon. A patrol officer fatally shot a suspect who fled after police stopped his vehicle, police said.  A Milwaukee Police Department statement did not name him but said he was 23 years old, had a lengthy arrest record and was carrying a stolen handgun loaded with 23 rounds of ammunition when stopped for unspecified "suspicious activity."  The statement did not say whether the man fired any shots or pointed the weapon at officers. A second suspect who fled from the vehicle was quickly taken into custody. The officer who shot the suspect was placed on administrative duty pending an investigation by the Milwaukee County District Attorney's Office, police said.  Crowds gathered and turned violent during the night. Windows of police cars were smashed and other vehicles were set on fire, as were a gas station, an auto parts store and at least three other businesses, officials and local media reported.  The National Guard was deployed in Ferguson, Missouri, in August 2014 after several nights of rioting over the police killing of an unarmed black man. Units of the National Guard, a part of the United States Armed Forces reserves, are under the dual control of the states and federal government.  Clarke, who endorsed U.S. presidential candidate Donald Trump at the Republican National Convention last month, has in the past advised residents to arm themselves against criminals. An African American, he has publicly opposed Black Lives Matter.  The sheriff's office typically oversees county-level law enforcement matters such as county courts, jails and pretrial services but deployed officers and equipment to help police quell Saturday night's riots. (Additonal reporting by Chris Michaud and Laila Kearney in New York and Julia Harte in Washington; Writing by Frank McGurty and Bill Trott; Editing by Howard Goller)  More from AOL.com: 'Unreal:' 3-year-old girl celebrating birthday struck by car and killed near 84th and Marion Police departments will have to report 'police-related deaths' Police: Chef murdered while catering wedding in Fairfax
Protesters fired gunshots, hurled bricks and set a gas station on fire in the U.S. mid-western city of Milwaukee on Saturday night.