Dzhokhar Tsarnaev
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Boston suspect pleads not guilty

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.

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.