BOSTON -- An official briefed on the Boston Marathon bombing investigation said Wednesday that authorities have identified a suspect in the attack and that an arrest is imminent.
Authorities planned to brief the media on the progress of the investigation at 5 p.m. local time this afternoon.Police Commissioner Edward F. Davis said shortly before noon after leaving FBI headquarters that investigators were “working hard and there’s a lot going on,” but he had no comment on whether progress had been made.
Authorities had appealed to the public for video and photographs of the area near the bombing scene at the finish line of the marathon, noting that many people among the crowd were likely to have taken photos of the conclusion of the world-renowned event.
Two bombs exploded within seconds of each other at 2:50 p.m. Monday near the Boylston Street finish line, killing three people and injuring 176, many of whom suffered major trauma from flying shrapnel, including nails and ball bearings that authorities have said were stuffed into the explosive devices by their makers.
A massive investigation is underway, involving local, state, and federal law enforcement, and officials have promised to go to the “ends of the earth” to find the culprit or culprits.
A spokesman for President Obama said at a Washington media briefing that the president would bring a message of “resolve” and “commonality” when he travels to the city Thursday for an interfaith service at the Cathedral of the Holy Cross.
“The way that the people of Boston and the city of Boston responded reminds us — and reminds the world — of just who we are as a people,” Jay Carney said in a media briefing in Washington, where he was also questioned about poisoned letters sent to the president and a senator.
Asked whether the letters and the bombs were considered linked, Carney deferred to an FBI statement that said there was no indication of a connection.
The bombings killed Martin Richard, 8, of Dorchester; Krystle Campbell, 29, of Arlington, and Boston University graduate student Lingzu Lu, a native of Shenyang, China, who was in her 20s.
The Boston Globe
reported today that investigators had found evidence that timing devices were used to detonate the bombs. Working at the city’s largest-ever crime scene, investigators also determined that bombs were probably fashioned from 6-liter pressure cookers, filled with nails and small ball bearings, like buckshot, to increase the carnage, and then hidden in black nylon bags or backpacks and left on the ground.
The lid of one of the pressure cookers was located on the rooftop of a nearby building.
FBI bomb experts at the FBI Academy in Quantico, Va., will try to rebuild the devices from fragments that include a circuit board that indicated the bombs were detonated on a timer, rather than remote control.
The FBI, which is leading the investigation into the bombing, had asked the public for tips on anyone who may have been lugging a heavy black bag near the finish line.