We've got all the latest developments as of Wednesday morning following Monday's horrific bombing at the Boston Marathon.

1. Latest Figures

In addition to the three people who died as result of the blast, 170 others were injured. As of Wednesday, 76 patients remain in Boston hospitals, with 20 in critical condition (including a 9-year-old girl and 10-year-old boy).

Massachusetts General Hospital chief of trauma surgery Dr. George Velmahos said four patients had to undergo above-the-knee amputations.

"It wasn't a hard decision to make," Velmahos said. "We just completed the ugly job that the bomb did."

2. Victims Identified

Martin Richard: The first of three victims identified, the 8-year-old Boston boy was a third-grader at the Neighborhood House Charter School in Dorchester, Mass., where he enjoyed activities such as soccer, basketball and baseball. He was just getting back from getting ice cream prior to the explosion. Martin's mother, Denise, and sister Jane, 6, were also hurt in the attack. (Denise suffered serious a brain injury; Jane lost a leg.)