By ALAN BLINDER and EMMA G. FITZSIMMONSAPRIL 29, 2014  A 19-year-old package handler at a FedEx warehouse in a suburb of Atlanta opened fire there on Tuesday morning, injuring six people before killing himself, the police said.  The gunman, Geddy L. Kramer, shot a security guard at a shack outside the building in Kennesaw, Ga., shortly before 6 a.m., the police said. He shot five people inside the warehouse before shooting himself inside a trailer behind the building.  The six victims were taken to a nearby hospital, where one victim, a 28-year-old man, remained in critical condition on Tuesday evening, the police said. Three victims, one woman and two men, were in stable condition at the hospital, and two others were treated and released.  At a news conference, Michael Nitzken, an emergency room doctor at the hospital, WellStar Kennestone Hospital in Marietta, Ga., said injuries to at least two victims were consistent with the firing of a shotgun at close range.  When the shooting was reported, the police quickly locked down the FedEx sorting site, which is just south of the runway at Cobb County Airport-McCollum Field. The airport, about 20 miles northwest of Atlanta, does not offer commercial flights from major airlines.  Mr. Kramer, who lived in the nearby city of Acworth, was found dead inside a trailer docked on the back side of the FedEx site with a self-inflicted gunshot wound, the police said. The police searched the building for “any other type of device that may have been left,” said Sgt. Dana Pierce of the Cobb County police.  FedEx released a statement on Tuesday saying that the company was grateful for the response by law enforcement officials.  “The situation is now stabilized, and we are focused on the needs of our team members and cooperating with the law enforcement investigation of this tragedy,” the statement said.  A FedEx clerk, Liza Aiken, told The Associated Press that she had been working inside the building when she saw the gunman.  “He had bullets strapped across his chest like Rambo, a huge assault rifle, and he had a knife,” Ms. Aiken said in a parking lot where employees were gathering. Before she could continue, a woman wearing a FedEx jacket told her to stop talking and led her away.  David Titus, a FedEx truck driver, told The A.P. that he was heading to work when he saw someone walk up and shoot a security guard in the abdomen outside the building. He said he could hear more gunshots after the gunman went inside.  “It was chaos,” Mr. Titus said. “Everyone was running, ducking and hiding, trying to get out of there.”  A version of this article appears in print on April 30, 2014, on page A13 of the New York edition with the headline: 6 Wounded in Shooting At Georgia Warehouse . Order Reprints|Today's Paper|Subscribe
The gunman, whose motive was not immediately known, appears to have killed himself after opening fire in a sorting center in Cobb County, Ga.