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Boston suspect Dzhokhar Tsarnaev pleads not guilty

11 July 2013 Last updated at 02:28 BST

The Boston Marathon bombing suspect, Dzhokhar Tsarnaev, has pleaded not guilty to setting off a pair of homemade bombs which killed three people and injured more than 250 others.

He entered the plea at the federal court in Boston.

Katy Watson reports.