Indonesian police said Thursday they are investigating six people, including a soccer club operator and three policemen, on suspicion of negligence that caused the deaths of 131 people and injuries to nearly 500 others in last week's crowd stampede at a soccer match.

The riot occurred after Arema FC from East Java Province's Malang was beaten by its rival Persebaya from the provincial capital of Surabaya, prompting a number of angry Arema supporters to invade the pitch and chase after Persebaya players and officials.

People offer flowers at the monument for Arema FC in Malang in Indonesia's East Java Province on Oct. 4, 2022, three days after 125 people were killed in a crowd stampede at a soccer match there. The stampede occurred following an eruption of violence after rival team Persebaya from the provincial capital of Surabaya beat Arema FC from Malang on Oct. 1, prompting a number of angry Arema supporters to invade the pitch and chase after Persebaya players and officials. (Kyodo) ==Kyodo

National Police chief Listyo Sigit Prabowo told reporters that the suspects include the president of a soccer club operator, the head of a soccer match organizer and a security officer of the organizer. They are suspected of failing to ensure the safety of spectators of the match at the Malang stadium.

Police fired tear gas canisters into the overpacked stadium, causing the spectators to scramble for a way out. Many of the victims died near gates, according to local police.

The head of the match organizer sold 42,000 tickets, far exceeding the stadium's capacity of 38,000, according to Listyo.

One of the policemen was aware of the stadium safety regulations stipulated by FIFA, the world soccer body, that ban use of firearms and tear gas. But he failed to prevent his colleagues from firing the gas, the national police chief said.

People mourn for victims in front of the stadium in Malang in Indonesia's East Java Province on Oct. 4, 2022, three days after 125 people were killed in a crowd stampede at a soccer match there. The stampede occurred following an eruption of violence after rival team Persebaya from the provincial capital of Surabaya beat Arema FC from Malang on Oct. 1, prompting a number of angry Arema supporters to invade the pitch and chase after Persebaya players and officials. (Kyodo) ==Kyodo

Related coverage:

Witnesses recount horror of Indonesia soccer stadium crush

125 killed in crowd stampede during football match riot in Indonesia