Secretary of State John Kerry started Wednesday's House Foreign Affairs Committee hearing by addressing the bombing of the Boston Marathon.
"It's impossible for me to express my sadness and anger," Kerry said. "It's just hard to believe that Patriots Day Holiday ... turned into bloody mayhem."
"Boston is not going to be intimidated by this," Kerry said. "We are going to find out who did this."
Three people have died and more than 170 people were injured in the Boston Marathon bombing, in which two explosions detonated near the race's finish line on Monday.
Watch a clip of Kerry's remarks above.