Three men who attended college with the Boston Marathon suspect have been charged in connection with the case.
Azamat Tazhayakov and Dias Kadyrbaye are charged with conspiring to obstruct justice. A third man, Robel Phillipos, is charged with making false statements to federal investigators.
An FBI affidavit says the three men removed bombing suspect Dzhokhar Tsarnaev's backpack from his dorm room at the University of Massachusetts at Dartmouth three days after the bombing.
The affidavit says Tazhayakov and Kadyrbayev agreed to get rid of it after concluding from news reports that Tsarnaev was one of the bombers.
A court appearance for the three is scheduled for Wednesday afternoon.