Sandwich shops and coffee stands are on alert in Shoreline, Bothell and Lake Forest Park.
King County deputies believe the same man could be behind a string of robberies or attempted robberies in those cities.
A man wearing a hooded sweatshirt and bandana on his face tried to rob a coffee stand in Bothell on Saturday.
That occurred after robberies at Subway sandwich shops in Shoreline and Lake Forest Park on Saturday.
