BOSTON (WKOW) -- Authorities in Boston Tuesday morning updated the number of injured in Monday's explosions to 176, with 17 of them in critical condition.
Three people have died from the explosions, which happened about 12 seconds apart near the finish line of Monday's Boston Marathon, while some runners were still on the course and crowds were still gathered near the finish line.
Boston Police confirmed Tuesday morning that security made two sweeps for explosives prior to the race. Police also say they are collecting surveillance video from businesses near the finish line to aid in the investigation, and are asking the public for any relevant photos or video.
Authorities said processing the crime scene could take several days, with local, state and federal agencies all working together.
Multiple media sources have reported that one of the deceased is an 8-year-old boy, whose mother and sister were also injured as they waited for their father to finish the race.
Eight hospitals are treating those hurt, with injuries ranging from cuts and bruises to amputations. Many victims suffered lower leg injuries and shrapnel wounds. Others suffered ruptured eardrums.
Dr. Richard Wolfe, chief of the department of emergency medicine at Beth Israel Deaconess Medical Center, said Tuesday that one or two of the hospital's 21 patients faced a "high probability of mortality."
The FBI has taken the lead in the investigation. Officials say they are treating it as a criminal investigation that is a potential terrorist investigation. They have not identified any suspects at this point and officials in Washington say there has been no immediate claim of responsibility.
WBZ-TV in Boston is reporting that police are searching an apartment in a Boston suburb, and authorities confirm it is part of the investigation into the explosions. A search warrant was served Monday night in an apartment in Revere, Massachusetts. Massachusetts State Police provided no further details.
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