The FBI released this photo of 19-year-old Dzhokar Tsarnaev, one of two suspects in the Boston Marathon bombings.
A member of the SWAT team stood guard in the Boston suburb of Watertown.
A Boston police officer searched outside of South Station for suspicious material after two bullets were found outside of the T stop in Boston.
Stranded travelers stood outside Boston's South Station after it was shut down following the early-morning shootings in Cambridge and Watertown.
A couple sat on the street in Watertown as SWAT team members searched for Boston Marathon suspect Dzhokhar Tsarnaev.
SWAT team members took position during their hunt for the suspect in Watertown.
A police unit drove through Watertown looking for the suspect.