A soccer club organizer and its chief of security were jailed by an Indonesian court on Thursday on charges of negligence leading to the deaths of 135 people when police fired tear gas inside a stadium last October, setting off a panicked run for the exits.

The disaster in Kanjuruhan stadium in East Java’s Malang city was among the world’s worst sporting tragedies.

The panel of three judges at Surabaya District Court, which was under heavy police guard, convicted Abdul Haris, the Arema FC Organizing Committee chair, and the club’s security chief, Suko Sutrisno, of criminal negligence causing death and bodily harm following a nearly two-month trial. About 140 witnesses testified during the trial.

Haris was sentenced to 18 months in prison and Sutrisno to 12 months, far below the more than six years sought by prosecutors for each of them.

Presiding Judge Abu Achmad Sidqi Amsya said the defendants had not verified the safety of the stadium since 2020 and “did not prepare an emergency plan.”

The crowd’s panic after the tear gas was fired caused a crush at six exits, where many fans were killed, he said.