Connecticut Medical Examiner Wayne H. Carver II tells the Hartford Courant that the remains of Adam Lanza were claimed several days ago by someone who wanted to remain anonymous.
A spokeswoman at Carver's office said she could not release details about the status of Lanza's remains.
The 20-year-old Lanza killed 20 first-graders and six educators at the Sandy Hook Elementary School on December 14. He also killed his mother in their Newtown home before going on the rampage and then committing suicide.
A private funeral was held earlier this month in New Hampshire for his mother, Nancy Lanza.
Police have not offered a motive for the killings.