PD: Man dies after opening fire inside Phoenix Jack in the Box

PHOENIX - A man who fired two gunshots inside a Phoenix Jack in the Box died of an unknown cause after workers and customers fled the business once the shooting started.

Around 10 p.m., the man walked into the fast food spot at Interstate 17 and Glendale Avenue and pulled out a gun.

That's when the employees and several customers ran out, fearing for their lives.

While it looked like a robbery, the situation quickly took a bizarre turn.

Moments after, witnesses heard two gunshots from inside.

Police say the man, whose identity hasn't been released, had abused drugs, been up for three straight days and was yelling that people were trying to kill him.

Investigators say the man didn't have any trauma or gunshot wounds on his body

An autopsy will be conducted to determine his cause of death.

Investigators believe the man probably died after the employees and customers fled the restaurant.

Nobody else was hurt.