Many of the injuries were to "lower extremities" and included tissue and bone damage, he said.

WSJ: Doctors Treating Boston Marathon Victims Describe Injuries

Dr. Peter Fagenholz, a trauma surgeon at Massachusetts General Hospital, said in a televised news conference that many of the 29 people brought there for treatment had suffered injuries to their lower extremities, some requiring amputation.

FORBES: This post was last updated on Monday, April 15 at 11 PM ET.