Multiple people shot after truck rams into building in Winthrop, Massachusetts.

A mass casualty incident has been declared in Winthrop, Massachusetts, after a truck crashed into a structure. Police have confirmed that 3 people were shot at the scene, including the suspected gunman. 

Winthrop Cross St at Shirley- truck took down a small brick building, resulting in a shots fired. police and emergency personnel are on scene and the surrounding area has been cordoned off. Initial reports show 3-4 people shot, including an officer.

Three people have been shot including the suspected gunman. Scene remains active but Police report there is no active danger to the public.