The Green Bay police are investigating a robbery at a Burger King in the city last night. Police were called to the restaurant located on the 1000 South Military Ave. at around 11:30 PM, and were told that a man pulled a knife on employees. The man took an undisclosed amount of money, and fled the scene. This robbery is very similar to incidents in Ashwaubenon, and other businesses in Green Bay. Police are attempting to see if the incidents are all connected. No one was injured in the incident.