Victims of the Boston Marathon bombing

Martin Richard killed in Boston bombing

Martin Richard killed in Boston bombing (Photo from CNN)

Martin Richard, 8, was killed. His mother, Denise, underwent surgery for a brain injury, and his 6-year-old sister lost her leg, WHDH reported. (Click here to read more about Martin.)

Krystle Campbell

29-year-old Krystle Campbell was killed in the Boston Marathon bombing. (Photo from Facebook)

A second victim of the Boston Marathon attack has been identified as 29-year-old Krystle Campbell of Medford, Massachusetts, the town’s mayor said. (Click here to read more about Krystle.)

lingzi_lu

Lingzi Lu (Courtesy ABC News / Darson Li)

Boston University graduate student Lingzi Lu has been identified by the school as the third person who died in Monday’s bombings at the Boston Marathon. Lu moved to the city last fall. (Click here to read more about Lingzi.)

In all, 176 people were treated at area hospitals after the blasts, with 17 in critical condition, Police Commissioner Davis told reporters a day after the blasts. It was not clear if he was including the fatalities.

The bombings resulted in at least 10 amputations and left doctors picking ball bearings out of victims in the emergency room, a terrorism expert briefed on the investigation said.

Some patients had been struck with metal beads slightly larger than BBs, Dr. Ron Walls from Brigham and Women’s Hospital said. And doctors removed more than a dozen small nails from one patient, he said.

Sean Collier portrait

26-year-old Massachusetts Institute of Technology police officer Sean Collier was shot and killed by the Boston bombing suspects as law enforcement officers closed in on their position. (Click here to read more about Sean.)