Among the survivors, Sandra Guzman, 40, left a capital hospital early on Sunday with a bandage on her left knee, walking with difficulty alongside her friend, Javier Ramirez, 31.
Both said this was the “first and last time” they would experience such a misfortune because they would not return to the stadium.
“A large crowd of people fell on me. I couldn’t even breathe, they were choking me,” Guzman told AFP.
When she was in front of a stadium gate, she said “people were pushing me to get in, they didn’t give me a chance to go back. When I came to see, I panicked, I had a lot of people on top of me.
“I fainted, and when I woke up I was in the hospital.”
Health Minister Francisco Alabi said earlier that the country’s hospital network was “providing medical care to all patients”.
Carlos Fuentes, spokesman for the emergency services group Comandos de Salvamento, said they were treating more than 500 people.
About 100 people in serious condition were taken to hospital, with some showing signs of asphyxia and other types of trauma, Fuentes said.
The stampede apparently started after a stadium gate fell, causing people to crowd together, he said.
At least two of the injured were in critical condition, according to police.
“EVERYONE WILL BE INVESTIGATED”
El Salvador’s President Nayib Bukele said the PNC and the Attorney General’s Office would investigate the incident and those responsible would be punished.
“Everyone will be investigated: teams, managers, stadium, box office, league, federation,” Bukele said on Twitter.
He warned that “whoever the culprits are, they will not go unpunished”.
Arriaza of the PNC said the investigation would determine responsibility “either by action or omission of some of those in charge”.
Police also aim to learn “why the fans made the decision to break through one of the gates on the south side” of the stadium.
In the same area, there were issues with the ticket office’s QR readers, he said.
The Salvadoran Football Federation (Fesfut) said in a statement it “deeply regrets” the events that occurred at the stadium and “expresses its solidarity” with the families of those “affected and killed”.
“Fesfut will immediately request a report of what happened and will communicate the relevant information as soon as possible,” it said.
Due to the incident, the federation said “all soccer is suspended at the national level” on Sunday.
The tragedy comes seven months after 135 people, including more than 40 children, were killed in a stampede following a football match in Malang, Indonesia.