Addressing the nation from the White House a few hours after the explosions, the U.S. PresidentÂ said: “We will find out who did this and we will hold them accountable.”
President Obama did not use the term “terrorist” in his speech but the FBI formally classifies the attack as a terror incident and will take the lead in the investigation.
“Make no mistake we will get to the bottom of this and we will find out who did this and find out why they did this,” Mr Obama said. “Any responsible individuals, any responsible groups will feel the full weight of justice”.
The U.S. President, who lived in neighbouring Cambridge for several years while studying at Harvard, praised Boston as “a tough and resilient town and so are its people”.
“I’m supremely confident that Bostonians will pull together, take care of eachother and move forward as one proud city,” Mr Obama said.
The President was informed of the Boston attack in about 10 minutes after the explosions and soon he telephoned Deval Patrick, the governor of Massachusetts, to offer the support of the federal government.
Mr Obama was also briefed by both Janet Napolitano, the secretary of Homeland Security, and Robert Mueller, the director of the FBI and ordered them “to provide whatever assistance is necessary in the investigation and response”.
Mr Patrick described the explosions as “a horrific attack” during one of the most “special days” in the city’s calendar, reports The Telegraph.
Senator Dianne Feinstein, the head of Senate intelligence committee, described the terrible attack as “a terrorist incident” but did admit that’s not known whether the bombers were foreign or “home-grown”.
Shortly after Obama’s promise to find the guilty, a White House official wasn’t as reluctant to characterize the incident as a terrorist attack.
“Any event with multiple explosive devices – as this appears to be – is clearly an act of terror, and will be approached as an act of terror,” the official said.
“However, we don’t yet know who carried out this attack, and a thorough investigation will have to determine whether it was planned and carried out by a terrorist group, foreign or domestic.”
Vice President Joe Biden talked with reporters by phone as reports of an attack first surfaced and was the first senior official to call it “a bombing”.
“Our prayers are with those people in Boston who have suffered injuries. I donâ€™t know how many there are. I donâ€™t know any of the details of what caused it, who did it, but our prayers are with the people of Boston,” he said as he watched television coverage of the attack.
The House of Representatives will hold a moment of silence for killed and wounded in today’s attack.
Two bombs were detonated in the very crowd at the finish line of the Boston Marathon on Monday, killing three people and injuring more than 100.
Thereâ€™re reports that there could be five additional, undetonated explosive devices around the Boston area. The evidence had yet to be fully analyzed, claims the media.
Marathon day in Boston began with silence for the victims of the Sandy Hook school shooting. The lead runners later passed the mile 26 marker, which was decorated with the seal of Newtown, Connecticut, and dedicated to the memory of those killed there.