Thirty-nine-year-old William Owens of Sicklerville, N.J. was hit by police gunfire after he and the hostages had exited the building, the state attorney general's office said.
Owens was armed with a handgun at the time, according to the A.G. He was pronounced dead at the scene.
Gunman dead after hostage incident at New Jersey UPS facility
The medical examiner left the UPS Mail Innovations facility around 6:30 p.m. Monday.
Authorities say the two female hostages were not harmed.
Though shots were fired by Owens when he first entered the building, no injuries were reported.
Officials say there was some kind of relationship between Owens and one of the women. Employees have said the suspect was angry at his ex-girlfriend.
"The guy come up there with a gun, beating her all in the face and then shot the gun up in the air in front of us," said one witness. "He was like 'I'm going to kill her, she was cheating on me.'"
Owens was not an employee at the UPS facility, family members said, but did work at another business at the same industrial park.
The attorney general's office said the investigation is ongoing.
Officials say UPS hostage situation is resolved
Family members said he was an honorable man and it was surprising to see what happened.
"He is a good guy. He would have trouble from time to time, you know, messing with the wrong female if you know what I mean," cousin Gail Wright said.
"Nobody seen it coming," Owens' niece said. "This came out of nowhere."
Owens' mother declined to talk.
When asked if Owens had any mental health issues, current girlfriend Paris Thomas said, "Maybe."
Thomas said she didn't even know Owens owned a gun. She said Owens had been struggling recently over the loss of his brother.
The incident happened at the facility on the 200 block of Birchcreek Road.
Authorities say the suspect entered the building shortly before 8:30 a.m. Monday and fired shots. Hostage negotiators began talking to the gunman by phone as he held the women in a barricaded room.
UPS employee speaks on active shooter situation in Logan Twp., N.J.
Shortly before noon, as the prosecutor's office was updating reporters on the situation, a short burst of gunfire was heard from the area of the facility.
Prosecutor Charles Fiore didn't say how many shots police fired, or whether the gunman fired shots at police.
Video from viewer Ashlee Erickson showed armed police officers swarming an office door shortly after the incident began.
An officer with a gun could be seen outside a loading dock door.
During an interview on 6abc, Erickson said: "From what I understand, it was someone who did not work there that was having a confrontation with their significant other."
Erickson said she knew something was wrong as soon as the facility was being evacuated.
"Then there was a massive police presence as soon as we were walking out of the building, there were a good ten cop cars, they all had their guns drawn out heading toward the main entrance of the building," Erickson said.
UPS employee speaks on active shooter situation in Logan Twp., N.J.
Employee Donelle Harden had a similar account.
"I noticed people running out the back exit and I asked a coworker 'why is everyone running outside?' Next thing you know I hear a gunshot and a coworker screaming 'Everybody get out, he's got a gun,'" Harden said.
Multiple police agencies at UPS facility in Logan Township
Police say 32 UPS employees were transported to a nearby Holiday Inn.
Charlene Carter was one of the workers. Carter said she may have been moments away from being involved herself.
"The lady said he got a gun, and I ran. I ran back out the door," said Carter. "If I had clocked in he would have had me at the gate."
Carter also said one of the hostages involved was the suspect's ex.
"She had a restraining order against him and everything," she said.
UPS worker recall start of hostage incident at UPS facility
Support is being offered for employees who witnessed the terrifying and dramatic standoff.
In a statement issued after the incident ended, UPS said:
"UPS greatly appreciates the work of the law enforcement personnel who responded to this morning's active shooter situation at the company's supply chain processing facilities in Logan Township, New Jersey. The incident is concluded and all of the employees are accounted for and being attended to by local officials. Support services for employees who work at the site will be provided as they recover from this unfortunate incident."
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