President Barack Obama says America’s Federal Bureau of Investigation is investigating the bomb attacks at the Boston Marathon. President Obama called the bombings “an act of terrorism,” and a "heinous and cowardly act." But he said officials do not yet know who carried out the attack or why. FBI officials say the investigation will be worldwide. The explosions killed three people and wounded more than 170 others.
The Learning English program “As It Is” will have a special report on the Boston bombings at 22:30 UTC Tuesday.
In this image from video provided by WBZ TV, spectators and runners run from what was described as twin explosions that shook the finish line of the Boston Marathon, April 15, 2013.
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following explosions in Boston, April 15, 2013.
Medical responders run an injured man past the finish line the 2013 Boston Marathon following two explosions in Boston, April 15, 2013.
A woman is comforted by a man near a triage tent set up after explosions went off at the 117th Boston Marathon in Boston, Massachusetts, April 15, 2013.