The shooting happened this morning at a Lockheed Martin aircraft plant outside Meridian, Mississippi, in the eastern part of the state near the Alabama border. It happened at the start of the day. Witnesses say the employee came to work with a shotgun and a semi-automatic rifle and then stated shooting his co-workers.
There are only 150 people who work at the plant, which builds parts for military aircraft. Before the morning was over, there were at least five dead and nearly a dozen others taken to local hospitals, with serious injuries.
Laderdale County Sherriff Billy Sollie says, "Many of the victims were shot at their workstations and they didn't even know they were being shot it was so quick."
Outside the plant, families looked at a list to learn the fate of their relatives working inside.
Chester Willis, a brother of a victim explains, "When you look on the list and see something like that, it is hard to handle."
Authorities say they are not sure if the gunman targeted people he disliked. More people could have died, investigators say, if he had additional ammunition. But, he killed himself first.
Today's attack is the nation's deadliest workplace shooting, since a software tester in Wakefield, Massachusetts kiled seven people in December 2002.