Boston Bombing Suspect Manhunt Update: Police Shutdown Mass Transit and Lockdown Watertown, Mass.

The newest development in the quest to apprehend one of the Boston Marathon Bombing suspects still on the loose is a huge one. The Boston Police announced at a press conference that they are shutting down the mass transit of Boston. Buses, subways, and trains will all be stopped.

The remaining suspect, the one wearing the white cap in the FBI photos, is believed to be in Watertown, Mass. and currently at large. Police have put the town under lockdown to prevent the suspect from escaping.

Over 1000 police officers have been mobilized in the manhunt for the suspect.