Hours after the FBI released images of the Boston Marathon bombing suspects, a response to a robbery in nearby Cambridge led to the fatal shooting of a Massachusetts Institute of Technology police officer. The shooting became a carjacking, then later a dangerous chase reportedly involving dozens of gunshots and explosive devices, ending up in neighboring Watertown. Authorities reported the shooting suspects were indeed the same men sought in the Boston Marathon bombing, identifying them as brothers Tamerlan Tsarnaev "Suspect #1" and Dzhokhar Tsarnaev "Suspect #2", both Kyrgyz nationals living in Cambridge. They later stated that Tamerlan, age 26, had been shot and killed, but younger brother Dzhokhar Tsarnaev, 19, was still at large. The manhunt intensified as the night went on, and the entire Boston area woke to find itself on lockdown, with public transportation shut down and citizens advised to stay indoors. Shortly before 7 p.m., shots were heard in Watertown, as Dzhokhar Tsarnaev was discovered hiding in a boat in the backyard of a residence. A brief standoff ended with the live capture of Dzhokhar, who is now in custody, 22 hours after the start of the manhunt, four days after the bombing.