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.