Here are photos from the bombing attacks that occurred near the finish line of the Boston Marathon.
At least two people are dead and dozens injured - including up to 10 with amputated limbs in the heart of downtown Boston, the Boston Police Department said.
Authorities were guarding a person of interest at a local hospital, sources told FoxNews.com. The person, who sources said was 20 years old, had severe burns, and is of Saudi descent, but authorities had not determined whether the person was a victim or a perpetrator. The FBI, which was treating the bombing as a terrorist investigation, was analyzing video from several area surveillance cameras.
Authorities in New York, meanwhile, are deploying counter-terrorism vehicles around landmark sites in Manhattan, including prominent hotels, according to the New York City Police Department.
Nearly 25,000 people, including runners from around the world, competed in Boston's celebrated 26.2-mile race, attracting huge throngs of onlookers, especially near the finish line.
"This is a horrific day in Boston. My thoughts and prayers are with those who have been injured. I have been in touch with the President, Mayor [Thomas] Menino and our public safety leaders. Our focus is on making sure that the area around Copley Square is safe and secured. I am asking everyone to stay away from Copley Square and let the first responders do their jobs," Governor Deval Patrick aid.
