Cambridge shooting in traffic leaves two critically injured as gunman stopped by police

A warning call arrived minutes before shots rang

A gunman allegedly opened fire on Memorial Drive in Cambridge, Massachusetts, in the middle of traffic, firing about 50 to 60 rounds around 1:30 PM. Two people were left with life-threatening injuries. Police say Cambridge received an earlier 1:06 PM warning call from Boston Police about a man behaving erratically and believed to be armed. The suspect was later stopped by Massachusetts State Police.