The gunman who killed 27 people and himself in Newtown, Connecticut, was buried at a private service over the weekend, a spokesman for his father said.
Peter Lanza claimed the body of his 20-year-old son Adam, the spokesman added.
Connecticut's chief medical examiner released Lanza's body on December 27.
The day after the second-deadliest school shooting in US history, Peter Lanza said in a statement: "Like so many of you, we are saddened, but struggling to make sense of what has transpired."
Update: Reuters have issued a correction on this story. Adam Lanza's body has been collected but not buried.
More top news
Speaking publicly about their divorce for the first time, the actress said she is confident she and Brad Pitt will remain a family unit.
Misty low cloud and some patchy fog again tonight but with mild air
Former world title challenger Michael Watson and his carer were assaulted by would-be thieves in an apparent car-jacking attempt.