BOSTON -- The sun rose on Tuesday after one of the darkest days for the city of Boston.
Two bombs exploded in the crowded streets near the finish line of the Boston Marathon on Monday, killing at least three people and injuring more than 140.
The fiery twin blasts took place about 10 seconds and about 100 yards apart, knocking spectators and at least one runner off their feet, shattering windows and sending dense plumes of smoke rising over the street and through the fluttering national flags lining the route.
Blood stained the pavement, and huge shards were missing from window panes as high as three stories.
"I was about 100 feet from the finish line [when the bombs went off]," runner Mark Clemente said. "I was in the middle of Boyle Street and I had my eye on the finished, and two my left I saw the first bomb go off."
Clemente said at first he thought the explosion was apart of the ceremony for the runners crossing the finish line.
"I felt the concussion of the blast hit me and saw some of the windows explode," he said. "It really hit me pretty hard. I was hit by some shrapnel, it didn't hurt me, I'm not completely sure if it was shrapnel or debris that hit my back."
Clemente said he didn't suffer any injuries just that his ears are still ringing from the noise of the blasts.
ATF and FBI are still on the scene where the bombings happened trying to collect more evidence in area.
Law enforcement agencies pleaded Tuesday for the public to come forward with photos, videos or any information that might help them solve the twin bombings.
"Someone knows who did this," Richard DesLauriers, FBI agent in charge in Boston, said at a news conference where he detailed the type of clues a bomber might have left. "Importantly, the person who did this is someone's friend, neighbor, co-worker or relative."