BIRMINGHAM, Ala. — Fired a day earlier from UPS, a man put on his work uniform, drove to an Alabama package sorting center and evaded security by entering through a truck dock in the rear, police and the company say.

Two former UPS co-workers were shot dead within minutes Tuesday, and the shooter, identified by police as Kerry Joe Tesney, lay dead atop his gun from what police said was a self-inflicted wound.

The shooter entered after about 80 drivers had left for the day to deliver packages from the Birmingham center, UPS said, possibly avoiding even more bloodshed.

“It was a relatively small crew that was remaining,” said Steve Gaut, a spokesman for the shipping company.

Authorities haven’t released the slain people’s names but said they were members of management.