terrorism

The teenage suspect in the Boston Marathon bombings has been arrested after being found hiding in a boat in a backyard of a suburb, police say.

Chechnya, located in the north Caucasus region, has been a thorn in Russia’s side for centuries. First czars, then Soviet leaders and Russian presidents fought independence movements there.

Officials warn suspect 2 is 'armed and dangerous', massive manhunt underway to apprehend him, pictured in FBI photos in white hat

FBI releases photographs and videotape of two suspects hoping that the public will help identify them

The work to identify a bombing suspect from video and photo evidence continues, after Boston Marathon footage yielded a possible breakthrough Wednesday.

As President Barack Obama closely monitors the federal investigation into Monday's Boston Marathon bombings, authorities are investigating letters, addressed to Obama and U.S. senators, that tested positive for the poison ricin based on preliminary results.

The FBI says the two bombs that exploded Monday at the Boston Marathon were carried in a dark-colored bag, and possibly consisted of pressure cookers packed with nails and ball bearings.

Prime Minister Antonis Samaras on Tuesday expressed his condolences to U.S. President Barack Obama over the deaths caused by twin bomb blasts during the annual Boston Marathon race.

Foreign leaders and governments around the world are condemning the bombing at the Boston Marathon, which left at least three people dead and dozens others injured.

Blasts occurred at the time the highest number of runners and their supporters are usually around the finish line area