Two of Dzhokhar Tsarnaev's roommates were arrested on charges of making false statements to investigators and conspiracy to obstruct justice, according to CNN.
It was also reported that the two students are from New Bedford, Massachusetts.
More top news
Justin Timberlake has confirmed he and his wife Jessica Biel are expecting their first child together.
Donations for a frail and visually impaired pensioner who was attacked outside his home have passed £200,000.
Labour's billboard posters during the general election campaign will focus on 'issues not personalities', the party's strategist has said.