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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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Uncle of Boston suspects urges 'turn yourself in'

The uncle of the Boston bombing suspects has urged Dzhokhar Tsarnaev to turn himself in.

Ruslan Tsarni said: "If you are alive, turn yourself in and ask for forgiveness from the victims, from the injured ... ask forgiveness from these people".

Mr Tsarni added: "He put shame on our family. He put shame on the entire Chechen ethnicity".

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