Mother doesn't believe sons were behind Boston marathon bombing

The mother of the two brothers suspected of the bomb attack on the Boston marathon has told the BBC she is sure her sons would never have done it.

Her younger son, Dzhokar, is in custody in the US awaiting his first court appearance, while her elder son, Tamerlan, died in a shoot-out with police a few days after the bombing.

Zubeidat Tsarnaeva, who has an American passport, says she is planning to return to the United States for Dzhokar's first court appearance next month.

Speaking to the BBC's Tim Franks in Dagestan, she said the word killing had no place in their house.