Police have decided not seek an indictment against former coaches of Nihon University's American football team over accusations that they instructed a player to commit a dangerous tackle on an opponent, investigative sources said Tuesday.

In documents sent to prosecutors the same day, the Tokyo police said they could not find evidence that former head coach Masato Uchida, 63, and former assistant coach Tsutomu Inoue, 30, issued instructions with a clear intent to inflict injuries on the opponent.

The injured Kwansei Gakuin University quarterback, Kosei Okuno, had filed a criminal complaint against the former coaches following the foul play in May last year that stirred controversy nationwide.