Watertown Manhunt: Gunshots Heard

Gunshots have been heard by a CNN reporter in Watertown, Massachusetts, where police are rushing to an area where Dzhokhar Tsarnaev may be. Tsarnaev is wanted for his alleged role in Monday's Boston Marathon bombing. Reports on the ground say there has been a rapid pickup in police activity about one hour after the State Police said that they did not know where Tsarnaev was, after having lost him last night after the suspect fled on foot after he or his brother shot MIT police officer Sean Collier.