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Boston bombs 'remote trigger'

US investigators have revealed the two bombs that went off at the Boston Marathon were detonated with the kind of remote control device used for a toy car.

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Heavy gunfire as suspect captured

Amateur video provided by Barstool Sports shows the police activity at the scene in Watertown Dzhokhar Tsarnaev was captured.

Prolonged, heavy gunfire can be heard as police and swat teams arrested the 19-year-old suspect. Tsarnaev remains in a "serious but stable" condition.

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