Two classmates of Boston Marathon bomb suspect Dzhokhar Tsarnaev (above right) and a third person face federal charges in connection with the April 15 attack, a federal law enforcement source said Wednesday.
Boston police announced the arrests Wednesday morning, adding that there was "no threat to the public." They were expected to appear before a federal judge Wednesday afternoon, U.S. government sources said.
The classmates -- Azamat Tazhayako (above left) and Dias Kadyrbayev (above center) -- are both from Kazakhstan and had been in federal custody on immigration charges already, their lawyers said. The third person arrested is a U.S. citizen.
The Kazakh students face charges of making false statements to investigators and conspiracy to obstruct justice, according to a federal law enforcement source with firsthand knowledge of the investigation.