Authorities have arrested additional people in connection with the Boston Marathon bombing.
Three college friends of suspect Dzhokhar Tsarnaev are suspected of removing items from his dorm room after the April 15 attack.
Two of the suspects were detained on immigration charges on April 20 and a third has now been taken into custody.
All three face charges of face obstruction of justice.
Authorities day there is no indication the suspects, all University of Massachusetts-Dartmouth students, had any prior knowledge of the bombing.