Two men who attended college with the Boston Marathon suspect and are charged with conspiring to obstruct justice have waived bail.
Azamat Tazhayakov and Dias Kadyrbayev appeared in court Wednesday and agreed to voluntarily detention. Their next hearing is scheduled for May 14.
A third man, Robel Phillipos, is charged with making false statements to federal investigators. He awaits a court appearance.
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.
Tazhayakov and Kadyrbayev have been held in a county jail for more than a week on allegations that they violated their student visas while attending the University of Massachusetts Dartmouth with suspect Dzhokhar Tsarnaev.
In a tweet Wednesday morning, Boston P.D. said three more suspects are in custody.
Three people were killed and more than 260 injured on April 15 when two bombs exploded near the finish line.
Suspect Tamerlan Tsarnaev died after a gunfight with police several days later. His brother, Dzhokhar Tsarnaev, was captured and lies in a hospital prison.
Both are Chechnyan natives who lived for several years in the U.S. They are accused of using a weapon of mass destruction.