The man suspected of killing two people early this morning at a New Jersey Pathmark before shooting himself to death during a confrontation with police is believed to be a 23-year-old former Marine who worked at the grocery store for two weeks, according to WABC-TV.

The suspect left the Old Bridge, N.J., shopping plaza at about 4 a.m. and returned, having changed into camouflage clothing, armed with an AK-47 and an automatic handgun, authorities told WABC, which reported that both victims, a man and a woman, were young adults.

Police had responded to shots inside the Pathmark on Route 9 at 4 a.m.

Authorities believe the man killed two before turning the gun on himself, according to WABC. There's no word on his motive.

"This is the worst phone call a mayor can receive," Old Bridge Mayor Owen Henry told NewJersey.com of the information he obtained about 6:30 a.m. "You can prepare for these things but you can't prevent them."

Several employees were inside the store, which was preparing to open at 6 a.m. Two windows near the entrance to the Pathmark were shot out.

Numerous employees were taken across the street to a T.G.I. Friday's and many were being treated for trauma at waiting ambulances.

The scene is now under control, according to WABC, and there were emergency responders in the plaza parking lot who had been standing in front of the store for some time.