DUMONT - (AP) - Police say a fifth-grader who jumped to his death from a second-story window at a New Jersey school had threatened to do it before on at least four occasions.

But police say a classmate never told anyone because he thought the boy was kidding.

The Record newspaper reports Dumont police released a report into what happened before the 10-year-old Grant Elementary School student leapt to his death after playing chess last month.

Police say a lunch aide said the boy was upset because his winning opponent never said "checkmate" and he asked the opponent, "do you want me to do something drastic?"

The aide saw the boy give his opponent a note, which she confiscated.

The report did not disclose the contents of the note.