“The number of deaths after the stampede at the Cuscatlan Stadium amounts to nine,” the National Civil Police posted on Twitter.
The security agency also noted that “several” injured people, including at least two in critical condition, were being taken to nearby hospitals.
The police said initial reports point to a crush of fans who tried to enter the stadium in the Central American country’s capital San Salvador to watch a match between teams Alianza and FAS.
El Salvador’s Interior Minister Juan Carlos Bidegain said the civil protection service’s first responders were on the scene and attending to people impacted by the incident.
Health Minister Francisco Alabi said the country’s hospital network was “providing medical care to all patients” in the aftermath of the stampede.
The tragedy comes seven months after 135 people including more than 40 children died in a stampede following a football match in Malang, Indonesia.