The Nigerian man charged with trying to blow up a Northwest Airlines flight near Detroit has been released from the University of Michigan Medical Center into the custody of federal marshals.

Gina Balaya, a spokeswoman for federal prosecutors in Detroit, said Umar Farouk Abdulmutallab is being kept in a secure location.

Abdulmutallab's lawyer said Sunday that he's now in a federal prison in Milan.

The 23-year-old Abdulmutallab was being treated for burns at the U-M Medical Center in Ann Arbor. He was charged Saturday with attempting to destroy or wreck an aircraft and placing a destructive device in a plane.

The FBI says a device containing an explosive was attached to his body Friday while aboard a Northwest Airlines flight from Amsterdam. Passengers put out the fire and subdued him.