Updated 4/16/2013

Rescue organizations are tending to thetragic scene at the Boston Marathonwhere at least three people were killed and more than 100 were injured after two explosions rocked the sporting event Monday.

About three hours after the winners crossed the finish line, a loud explosion went off just before the bridge that marks the finish line and another explosion was heard moments later, according to the Associated Press. The extent of the injuries remains to be seen, but an ER nurse at Carney Hospital in Dorchester told AOL that “this is awful” and that there are “amputations everywhere.”

The American Red Cross of Eastern Massachusetts has opened a disaster operation center and is asking locals to notify loved ones of their whereabouts on theorganization’s website.

The final mile of the marathon had been dedicated to the victims of the Newtown massacre , according to CBS and a group of nine racers from the area were running to raise funds for the Newtown Strong Fund, which helps the victims’ siblings pay for their education. Joanne Flaminio, Boston Athletic Association president, told the news outlet that the race had “special significance” considering that it spanned 26.2 miles and 26 people were killed during the Sandy Hook Elementary School shooting.

HOW YOU CAN HELP: This story is developing. Please check back for updates on how to help.

• Massachusetts Governor Deval Patrick and Boston Mayor Tom Menino have formed The One Fund Boston, Inc. to help the people most affected by the Boston Marathon tragedy. Find out how you can get involved here.

• The Red Cross says the best way to help right now is to get in touch with loved ones through its Safe And Well Listings. The organization is not asking for blood donations at this time.

• The Salvation Army has deployed four mobile feeding kitchens and more than 30 volunteers to dispense food, drinks and emotional support in Boston. One canteen is stationed at the Family Assistance Center at the Park Plaza Castle where survivors and first responders are congregating. Find out how you can get involved here.

• Some marathon runners are stranded in Boston and in need places to stay. Find out how you can offer housing here.

• Anyone with info about the incident can call 1-800-494-TIPS.
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