FBI investigating bombings in Boston
Updated: Tuesday, April 16 2013, 12:48 PM EDT
BOSTON (NEWSCHANNEL 3) - FBI investigators are still piecing together evidence in the Boston Marathon bombings.
They still don't know who was behind the deadly blasts that left three dead and more than 175 people injured, 17 of those are critical.
The two bombs exploded just before three Monday afternoon just as marathon runners were finishing the famous Boston Marathon.
Newschannel 3's Randall Pinkston was live in downtown Boston with the latest on the investigation in the video report above.