At least two homemade bombs detonated at the finish line of the Boston Marathon in Copley Square just before 3 p.m. today, setting off explosions that killed three people and injured more than 100, many of whom lost limbs. According to early reports, three other explosive devices were found nearby, one of which was set off by police in a controlled detonation (a simultaneous fire at the JFK Library is said to have been unrelated). There are no suspects in custody, but police are searching for a person of interest who tried to gain access to a restricted area just before the bombs went off.
President Obama held a no-nonsense press conference moments ago where he promised to bring any responsible parties to justice, but clarified that they had no information yet on who those responsible parties might be. More »