Daniel (left) and Caleb Tate  Chester County District Attorney's Office  05/18/2016 AT 01:50 PM EDT  Two Pennsylvania brothers are accused of building improvised explosive devices using stolen materials and going on a 10-day long bombing spree last December, PEOPLE confirms.  Nobody was injured in the alleged bombings, but the bombs were strong enough to kill, authorities said.  Daniel and Caleb Tate, both 22, are facing several charges including arson by explosion and theft for allegedly setting off the IEDs in Chester and Lancaster Counties, Chester County District Attorney Tom Hogan said in a statement obtained by PEOPLE.  "We live in a world where the thought of bombs exploding around us is a very real fear," Hogan said in the statement. "These defendants brought that fear to our region during a two-week crime spree where they detonated multiple IEDs."  Chester County District Attorney's Office  The brothers were home from college for winter break – Daniel attended Pepperdine University in California at the time and Caleb is a student at Tennessee's Belmont University – when they allegedly built bombs out of metal pipes, fuel containers, propane canisters and other items, according to an affidavit obtained by PEOPLE. They allegedly operated during the early morning hours, the affidavit states.  Chester County District Attorney's Office  The brothers, from Cochranville, began the alleged spree on Dec. 20, allegedly blowing up a mailbox in Highland Township. Two days later, they set off another explosive in a wooded area in Londonderry Township, the affidavit states.  The affidavit states they allegedly blew up an Amish phone shed on Dec. 30; on Dec. 31, they allegedly blew up an Amish produce shed in Lancaster County and a well pump shed back in Chester County.  Chester County District Attorney's Office  Investigators said they discovered video footage of the pair allegedly stealing materials for the handmade bombs from local stores. The affidavit states that the explosions took place within 12 miles of one another.  Daniel and Caleb both allegedly confessed to the bombings in February and Daniel told investigators that their little brother Andrew watched.  The two were released on $25,000 bail and are set to appear in court on June 9, a spokesperson Hogan's office tells PEOPLE. They have not yet entered a plea.
Daniel and Caleb Tate allegedly used handmade bombs to blow up a mailbox and several Amish sheds in two Pennsylvania counties