At least two people died on Wednesday during massive celebrations in Mexico City as the national team advanced to the next round at the World Cup.
A 19-year-old woman and a 44-year-old man died of asphyxiation, the city's health ministry said.
Authorities have not confirmed the death of a third person.
The celebrations came after Mexico beat Ecuador to record their first World Cup knockout win since 1986, sending the co-hosts into the round of 16.
More than a million people gathered in the streets of Mexico City, mainly around the Angel of Independence monument, according to estimates by the city government.
After the final whistle, celebrations erupted alongside the city's Reforma avenue, where thousands of Mexicans gathered for the festivities.
Families and groups of friends erupted in cheers, while some fans tossed others into the air amidst the roar of the crowd.
The scene played out across dozens of neighbourhoods, bars, and parking lots transformed into fan zones to honour an undefeated national team.
Footage showed thousands of people gathering in the streets of Mexico's capital, cheering, jumping and waving their country's flag as fireworks illuminated the sky.
Last night's victory comes as a massive win for Mexico, which has lost seven consecutive times at the same stage from 1994 to 2018 and didn’t advance past the group stage in 2022.
Mexico will play another home match on Sunday against the winner of Wednesday’s match between England and Congo.
Playing at the iconic Azteca Stadium, the Mexican squad boasts an undefeated record across 10 World Cup matches. Mexico has just two official losses at the venue — the last being a World Cup qualifying defeat to Honduras on Sept. 6, 2013.
With the win, Mexico extended its unbeaten run to 12 games, dating back to a friendly loss against Paraguay in November.
Mexico also became the first CONCACAF side to eliminate a team from CONMEBOL in a World Cup knockout match. Teams from South America won the previous five meetings.