People comforting each other after Boston blast 370.
(photo credit: REUTERS/Jessica Rinaldi)
The American people refuse to be terrorized, US President Barack Obama
say Tuesday as he called the Boston bombings an "act of terror", but
said it is not clear yet whether the twin blasts were the work of a
foreign or domestic group or a "malevolent individual."
appearance in the White House briefing room, Obama urged Americans to be
vigilant and to watch for suspicious activity a day after two
explosions rocked the finish line of the Boston Marathon, killing at
least three people and wounding scores more.
Obama, briefed by
FBI Director Robert Mueller, Homeland Security Secretary Janet
Napolitano and other national security aides, said there is still much
to be investigated in what was the worst attack on US soil since Sept.
There is no sense of a motive and no indication as to
who planted the bombs and detonated them, he said, condemning it as a
"heinous and cowardly act."
"Any time bombs are used to target
innocent civilians, it is an act of terror," Obama said. "What we don't
yet know, however, is who carried out this attack or why, whether it was
planned and executed by a terrorist organization - foreign or domestic -
or was the act of a malevolent individual."
The president ordered the US flag atop the White House lowered to half staff in memory of the victims.
He said the investigation into the bombings is just beginning.
will take time to follow every lead and determine what happened. But we
will find out," Obama said. "We will find whoever harmed our citizens
and we will bring them to justice. We also know this: the American
people refuse to be terrorized."