NBC reports:

The Boston Marathon bombing suspect was captured alive Friday after a standoff in boat in a Watertown backyard, police said.

Police converged on a home at 67 Franklin Street and surrounded a boat in the driveway where 19-year-old Dzhokhar Tsarnaev was hiding.

This came after a tip from a resident that she had seen blood on the boat and in the grass and noticed a ladder.

Earlier, officials revealed that Dzhokhar and his older brother, Tamerlan, exchanged 200 rounds with police during a stunning firefight early in the morning and left seven homemade explosives behind.

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