Latest about Boston Marathon bombing: FBI reveals pressure cooker clues

One of those who died has been named as eight-year-old Martin Richard, from the Dorchester area of Boston. He was at the finishing line with his mother and sister, who were both seriously injured.

A second victim was named as Krystle Campbell, a 29-year-old restaurant manager.

Boston University said the third person who died was a graduate student. In a statement on Tuesday, it said it was not releasing the name or any other information about the student pending permission from the family.
The Chinese consulate in New York later confirmed that the student who died was a Chinese national.

Bombs that targeted the Boston Marathon on Monday may have been packed in pressure cookers, investigators say.

Images from a joint Homeland Security and FBI bulletin show the remains of a dark backpack, a detonation device and mangled pieces of metal.

Three people were killed and more than 170 injured when two bombs exploded near the finish line of Monday's race.

Those who died were an eight-year-old boy, a woman aged 29 and a postgraduate student from China.

President Barack Obama will travel to Boston on Thursday for a memorial.

FBI Special Agent Richard DesLauriers told a news conference that pieces of nylon had been recovered from the scene, along with fragments of ball bearings and nails that were "possibly contained in a pressure-cooker device".

He said they were being sent to the agency's laboratory in Quantico, Virginia, where experts would reconstruct the devices to determine their make-up and components.

He added: "The investigation is in its infancy. There are no claims of responsibility and the range of suspects and motives remains wide open."

Mr DesLauriers urged people to report anyone they had seen acting suspiciously.

"Someone knows who did this," he said.

Associated Press quoted a source close to the investigation as saying that the bombs consisted of explosives placed in 1.6-gallon pressure cookers, one with shards of metal and ball bearings, the other with nails.

The bombs were put into black bags and left on the ground, the source said.

Our correspondent says it has also been reported that a circuit board and battery pack - parts of a triggering mechanism - were also recovered.

Doctors treating the wounded say their injuries indicate that the bombs contained metal shards and other shrapnel. A number of victims have had limbs amputated.

Speaking at the same news conference, Massachusetts Governor Deval Patrick said the Boston community would "recover and heal" from the attack.

"This is one community. We are all in this together," he said.
Source: BBC Posted by Unknown 4/17/2013