The Federal Bureau of Investigation released photos of two suspects in the Boston Marathon bombings and sought the public's help to identify them. The FBI said they consider the two men to be "armed and extremely dangerous."
The FBI, seeking a quick resolution to one of the nation's biggest terror attacks since Sept. 11, 2001, urged the public to come forward with tips about the two men, who were described as the principal focus of the investigation. The two were seen together and then separately, with one putting a bag down at the same spot where the second of two blasts went off Monday