Green Oak police are asking the public to contact them at (810) 231-9626 if they recognize this suspect who robbed a 7-11 Friday night.

Courtesy of Green Oak police

Police issued an an alert to businesses and retail stores after two armed robberies took place Monday morning in Livingston County.

At 7:15 a.m., the BP gas station at 204 W. Grand River Ave. in Brighton was robbed, according to information from police. The PNC Bank at 8130 W. Grand River Ave. was hit next, at 9:45 a.m.

The suspect is described as a white male in his 20s, 5 foot 5 inches to 5 foot 7 inches tall, wearing sunglasses, a black winter jacket and hoodie underneath the jacket. The suspect's weapon was described as a black semi-automatic handgun. Additional information will follow if more information becomes available.

The alert came just a few days after the 7-11 at 11501 Grand River Ave. was robbed in nearby Green Oak Township. Just before 8:53 p.m. Friday, a man walked in with a black scarf on his face brandishing a black semi-automatic handgun and demanded money, according to Green Oak police. The man took an undisclosed amount of cash and fled.

The suspect in that robbery is described as a white man, 20-30 years old, 5 foot 10 inches tall and about 180 pounds. In addition to the scarf on his face, the man was wearing a knit winter cap with ear flaps, a grey sweatshirt and blue jeans.

Call your local police or Livingston County Central Dispatch at (517) 546-9111 if you observe someone matching the suspect's description.

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John Counts covers cops and courts for AnnArbor.com. He can be reached at johncounts@annarbor.com or you can follow him on Twitter.