CNN Source: Boston suspect arrested

FBI: 'No arrests made' in Boston Marathon bombing

Investigators have identified a suspect in the Boston Marathon bombing and that an arrest is imminent, based on security video shot from a nearby department store, according to a broadcast report.

CNN said footage from Lord & Taylor, on the same Boylston Street block torn apart by blasts Monday, have led investigators to a man believed to have planted the second bomb.

The suspect appeared to have a dark complexion, CNN said.

The Boston Globe is reporting that authorities have an image of a suspect carrying, and possibly dropping, a bag at the second bombing scene, just outside the Forum restaurant.

Authorities said yesterday the bomber used a pair of six-liter pressure cookers packed with metal nails and ball bearings to rip his helpless victims apart at the finish line.

The terrorist put the pots in black nylon bags, and, perhaps, put those bags into light-colored bags, and placed them at viewing areas on Boylston Street, where the blasts killed three and wounded more than 170.

Each bomb was a crude device equipped with a timer, said a law-enforcement source.

A photo obtained by Boston’s 7News, taken about an hour before the blast, suggests one of the hidden bombs was placed inside a light-colored bag next to a mailbox. A follow-up picture taken at the same spot captures the aftermath of the explosion.

The station, which turned the photos over to the FBI, said it blurred part of the second image because it was so graphic.

This morning, the lid of a pressure cooker was found on a roof near the scene, a federal law enforcement official told CNN.

Hundreds of federal agents and Boston cops painstakingly collected and documented every item strewn about after two bombs exploded about 10 seconds and up to 100 yards apart along Boylston Street Monday.