Officials take crime scene photos a day after two explosions hit the Boston Marathon in Boston, Massachusetts April 16, 2013. Officials investigating the Boston Marathon bombing said on Tuesday that no additional explosive devices have been discovered other than the two that detonated near the race's finish line, a development that could complicate the case. At this point, no one is in custody in connection with the Monday afternoon attack that left three dead and sent 176 to area hospitals, Boston Police Commissioner Ed Davis said.
REUTERS/Shannon Stapleton (UNITED STATES - Tags: SPORT ATHLETICS CIVIL UNREST CRIME LAW)