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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Mother says Boston suspects attended race last year

The mother of the two brothers suspected of the Boston Marathon bombing has told ITV News that her sons went to the event last year.

Her chilling admission comes a day after her youngest son was charged with the crime in hospital.

The mother of Tamerlan and Dzhokhar Tsarnaev remains adamant they are innocent. She has told ITV News that her children had 'nothing to do' with the explosions which killed three people.

Her surviving son though has been charged. From the family's home town in the Russian republic of Dagestan, ITV News Correspondent Martin Geissler spoke to Zubeidat Tsarnaev:

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