Police also said the man has been known to approach employees while they're outside, taking a break, and he's threatened harm to victims who don't cooperate.

Police described him as a black man, about 6 feet tall, with a stocky build. He often wears shorts over his trousers, carries a black Nike duffel bag, has been known to carry a white and red umbrella and runs on foot or on a bicycle.

The man struck again Friday morning, and has robbed the following places:

Speedway on Snelling Avenue,

Caribou Coffee on Snelling Avenue,

Wendy's on University Avenue,

Shuang Hur Grocery store on University Avenue,

McDonalds on Jefferson Avenue, and

Speedway on West Seventh Street.

Anyone with information is asked to call 651-266-5650.