BOSTON (MyFoxBoston.com) -- A man was shot and killed by police after he allegedly approached them with a large knife in Roslindale on Tuesday morning. Police say the shooting happened near a CVS on Washington Street around 7 a.m. Law enforcement officials said Tuesday afternoon that they did not approach the man, 26-year-old Usaama Rahim, with their guns out, but that Rahim pulled out a large, military-style knife.