(NECN) - Police in New Haven, Conn. say a man has robbed four businesses all in the last week.
The businesses are a Pizza Hut, a Dunkin' Donuts, a 7-11 and a Subway sandwich shop.
New Haven police have surveillance photos from Friday's robbery at the Dunkin' Donuts on Ferry Street.
Police say the suspect used a knife to rob that store and then used the same weapon at the Pizza Hut Saturday.
In the other two robberies, the suspect threatened employees with a syringe.
New Haven police ask that if you recognize the man or have any information to contact them.