Boston Marathon Update

The city of Boston in the United States witnessed twin bombings believed to be a terrorist attack.
The blasts took place at the 117th edition of the Boston Marathon.

President Obama on Tuesday called the bombing of the Boston Marathon "a heinous and cowardly act" and said the FBI is investigating the blasts that killed at least three people and injured more than 170 as "an act of terrorism."

"Any time bombs are used to target innocent civilians, it is an act of terror," Obama said in a brief statement from the White House. He said authorities don't yet know the motive behind the attack or whether it was the work of a terrorist group or "a malevolent individual."

The President spoke as the FBI was mounting a worldwide investigation and police were scouring hours of videotape and thousands of photographs in an effort to learn who detonated two bombs near the finish line of the venerable sporting event on Monday, blasting runners off their feet and critically injuring 17 people.

Investigators believe the bombs were placed inside pressure cookers, according to a law enforcement official, who spoke on the condition of anonymity. The official who said that pieces of pressure cookers have been recovered from the scene, cautioned that investigators do not know how the explosives were detonated.

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