New York, June 30 -- Ecuador's football federation has lodged a complaint with World Cup organisers after local fans gathered outside the team's hotel ahead of their last-32 match against co-hosts Mexico, saying the incident violated fair play principles.

According to local media as per Reuters, around 1,000 Mexican supporters staged a late-night "serenade" outside Ecuador's hotel in Mexico City on Monday, using noisemakers, pots, and buckets while singing the Mexican folk song "Cielito Lindo." Police later intervened and dispersed the crowd.

"This conduct is far removed from the principles of fair play, equality and unity that a football World Cup should represent," the FEF said in a statement.

It urged authorities to pay closer atten...