In a tearful press conference the mother of the two brothers suspected of the Boston Marathon bombing has said that: "I don't and I won't" accept that her sons were involved in the attack.
Asked if she wishes her family had never moved to the US Zubeidat Tsarnaev said: "I thought America would protect us. It would be safe. America took my kids away from me."
Earlier this week ITV News Correspondent Martin Geissler spoke to Zubeidat Tsarnaev.
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Some children, particularly those who have been more directly affected, may show symptoms of stress and trauma.
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The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.