Outside the courthouse in Boston. Police say three additional suspects have been taken into custody -- the latest in the investigation into last month's marathon bombings.
Authorities announced the development on twitter. Police say two of the suspects are classmates of 19-year-old Dzhokhar Tsarnaev, who was a student at the University of Massachusetts Dartmouth. Police are investigating whether they threw away a backpack at Tsarnaev's request after the bombing. The third suspect is a U.S. citizen.
