FIFA has launched an official investigation over the behaviour of Hong Kong fans in a match against Qatar after they jeered the Chinese national anthem and threw a drink at a rival player.
Fans booed the "March of the Volunteers" - the anthem they share with China - at a World Cup qualifier played in Hong Kong last week, which the home side lost 3-2.
Last year's "Umbrella Movement" mass pro-democracy protests have soured attitudes in the semi-autonomous territory towards Chinese authorities and prompted resentment among some fans that the Chinese anthem is used to represent the city's team.
The Hong Kong Football Association (HKFA) said Friday that FIFA, world football's governing body, was also investigating an incident where a carton of lemon tea was thrown at a Qatari player.
"The HKFA has received correspondence from FIFA (dated 15th September) announcing that disciplinary proceedings have been opened against the HKFA in relation to incidents that took place during the recent Hong Kong vs Qatar match," the HKFA said in a statement.