Mass. gov: No unexploded bombs at Boston Marathon

JIMMY GOLEN
Associated Press
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A solitary runner heads down the banks of the Charles River in Cambridge, Mass., in front of the Boston skyline, at dawn the morning after explosions killed three and injured more than 140 at the Boston Marathon, Tuesday, April 16, 2013. The bombs that blew up seconds apart at the finish line of one of the world's most storied races left the streets spattered with blood and glass, and gaping questions of who chose to attack at the Boston Marathon and why. (AP Photo/Charles Krupa)

BOSTON (AP) — Massachusetts Gov. Deval Patrick says no unexploded bombs were found at the Boston Marathon. He says the only explosives were the ones that went off Monday.

Three people were killed, including an 8-year-old boy, and more than 150 injured by two explosions just seconds apart near the finish line.

Special Agent in Charge Richard DesLauriers says there are no known additional threats and agents are following a number of leads.

ATF agent Gene Marquez says authorities are looking for amateur video and photographic evidence that can give clues to who set off the bombs.