Friend of Boston bombers charged with obstruction

A man who knew the brothers suspected of carrying out the Boston Marathon bombings has been charged with obstructing the investigation.

Khairullozhon Matanov, a legal resident of the US originally from Kyrgyzstan, destroyed, altered and falsified records in a federal investigation, and made false statements in a federal investigation, federal prosecutors said.

Matanov, 23, is not accused of participating in the April 2013 bombings that killed three people and injured more than 260, or of knowing about them in advance.