The Traffic Unit with the Thunder Bay Police are investigating a collision between one of their cruisers and another vehicle. It happened around 9:30 Friday evening while the cruiser was responding to a robbery at a Mac's Milk on South Syndicate. Both vehicles involved suffered extensive damage and two people received minor injuries. Meanwhile police are looking for a woman they believe was involved in the store robbery. The store clerk noticed some unpaid items in the woman's pocket on her way out of the store, she then claimed to have a weapon and fled. She is described as a Native American woman in her mid-twenties, around 5'7 with a thin build and dark hair. Anyone with information is urged to contact crime stoppers.