Argentina defeated England 2-1 in the semifinal in Atlanta on Wednesday. After the match, players posed with a banner handed to them by fans that read "Las Malvinas son Argentinas" ("The Malvinas are Argentine"), referring to the Falkland Islands by their Argentine name, Islas Malvinas.

UK says political messages have no place in football

The banner has sparked criticism from the UK government, which argued that political statements should not be made during FIFA tournaments.

British Business Secretary Peter Kyle urged FIFA to examine the incident, saying the governing body has clear rules against political messaging on the field.

"Politics needs to be separate from football. In fact, one of the central tenets of the World Cup is that politics is kept separate from the game. That is now a matter for FIFA, and I expect FIFA to carry out a thorough investigation," Kyle told the BBC.

Under FIFA regulations, teams and players can face disciplinary action for displaying political messages during official competitions.

Long-running sovereignty dispute

The controversy has reignited the decades-old dispute between Britain and Argentina over the Falkland Islands, a British Overseas Territory located in the South Atlantic.

Home to around 3,500 people, the islands lie about 480 kilometres off Argentina's coast and roughly 13,000 kilometres from the United Kingdom.

Argentina maintains that Britain illegally seized the islands in 1833 and continues to claim sovereignty over the territory, which it calls the Islas Malvinas.

Britain, however, says its claim dates back to 1765 and argues it reasserted control in 1833 after removing Argentine forces that had attempted to establish authority over the islands.

Dispute led to 1982 war

The sovereignty dispute escalated into the 1982 Falklands War after Argentina invaded the islands. The 10-week conflict ended with British forces regaining control.

The war claimed the lives of 649 Argentine soldiers, 255 British military personnel and three island residents.

FIFA has not yet commented on whether it will launch an investigation into the banner displayed by Argentina's players.