The Palestinian flag – which flew widely across Qatar in the final – was seen waved by Moroccan players after the dramatic penalty shootout victory over the Spaniards.
FIFA regulations prohibit the display of banners, flags and leaflets deemed “of a political, offensive and/or discriminatory nature”. In the past, football governing bodies have issued fines for displaying the Palestinian flag inside stadiums.
Moroccan players also flew the Palestinian flag after the team’s win over Canada in the group stage last week.
World Cup host Qatar has no relationship with Israel and remains a supporter of the Palestinian cause for a decades-long state.
Israel has occupied the Palestinian territories of East Jerusalem and the West Bank since the 1967 Six-Day War with Arab nations.
Around 250,000 Palestinians live in Qatar, which has a population of around 2.9 million, mostly foreigners.