More than 100 people were seriously injured at Alianza FC's Cuscatlan stadium in El Salvador on Sunday. 

The club will be forced to play home games behind closed doors for a year, while they have until July 21 to pay a 24,000 pound fine imposed by the Salvadoran Football Federation.

And Deportivo FAS will advance to the semi-final of the Salvadorian Primera Division play-off after being declared 2-0 winners.

El Salvador President Nayib Bukele said a "thorough investigation" will take place looking into the stampede. He wrote on Twitter: "Everyone will be investigated: teams, managers, stadium, box office, league, federation, etc. Whoever the culprits are, they will not go unpunished."

Authorities initially stated the tragedy occurred after a crush of fans tried to enter the stadium, which is the biggest in Central America with a capacity of 44,000.

Play was suspended about 16 minutes into the match after fans in the stands began waving frantically.

They managed to get the attention of those on the field and carried the injured out of a tunnel and down to the pitch. Emergency personnel evacuated people from the stadium, while hundreds of police officers and soldiers gathered as ambulance sirens wailed.

The incident in El Salvador comes after a deadly stampede killed 135 people last year at a stadium in Indonesia's East Java in October. Many were crushed as they fled for exits after police fired tear gas into the crowd.