Terrorism, Boston Marathon | featured news

The two bombs that ripped through the crowds at the Boston Marathon, killing three people and wounding more than 170, were fashioned out of pressure cookers and packed with shards of metal, nails and ball bearings, a person briefed on the investigation said Tuesday.

David Gergen says people there will grieve for many days, but anyone who thinks an attack on this city will produce fear, doesn't know the bravery and spirit of this historic town.

New developments: The identity of a second victim was revealed Tuesday. Krystle Campbell, a 2001 graduate of Medford High School, died in the attack, Medford Mayor Michael McGlynn said.

US President Barack Obama has condemned the bombings at the Boston Marathon as a "terrorist act". He said the attack had been a "heinous and cowardly act", but said it was not yet known who carried out the attack and why. The FBI has said there are "no known additional threats" beyond the two bombs which went off. Three people were killed, including an eight-year-old boy, and more than 150 injured by the bombs.

British police are reviewing security plans for Sunday's London Marathon, the next major international marathon, because of the deadly bombs that hit the race in Boston....

The Federal Aviation Administration is warning pilots that it has created a no-fly zone over the site of two explosions at the annual Boston marathon....

A series of explosions was reported near the finish line at the Boston Marathon on Monday, leaving two people dead and at least two dozen injured, according to the Boston Police Department. A third explosion was heard just before 4 p.m., about an hour after the first two blasts. The police were apparently aware of that device before the explosion occurred.