CLINTON TOWNSHIP, Mich. -

Clinton Township police have released surveillance video of a man robbing a 7-Eleven convenience store.

It happened Sept. 2 on Harper Avenue near 16 Mile Road.

The man went into the store once and looked around, then returned 40 minutes later. He threatened the clerk with a knife and demanded money.

Police are asking anyone with information about who this man is, to give them a call.