DETROIT, MI- A suburban police officer left a submachine gun in his unmarked vehicle while he attended a baseball game downtown, and returned to find it stolen, police said.

The narcotics officer from Oakland County's West Bloomfield Township left the weapon covered in the back seat of his Jeep while he attended a Detroit Tigers game Wednesday night at Comerica Park, West Bloomfield Police Chief Ron Cronin told local TV stations.

"He gets an `A' for stupidity in this case," Cronin said of the officer, whom he did not identify. "You can bet he's gonna be disciplined."