Protestors are targeting Hong Kong airport today and over the weekend as part of wider political demonstrations across the former British colony.
The move prompted a fresh Foreign and Commonwealth Office travel alert.
Demonstrators started gathering at the airport at 1pm local time.
The Airport Authority Hong Kong said it was aware that there have been calls posted online for a public assembly at the airport on August 9-11.
“The airport will operate normally. Passengers should allow sufficient time for travelling to the airport,” the authority said.
“Passengers are also advised to check the flight status on the Hong Kong International Airport website or the ‘HKG My Flight’ mobile app, or enquire with the airlines for updated information before coming to the airport.”
The FCO said: “In recent weeks, several large-scale political demonstrations have taken place on Hong Kong Island, in Kowloon and various suburbs in the New Territories.
“Clashes have taken place between police and protesters following otherwise peaceful protest activities. These have involved significant violence. Reports indicate the protests are likely to continue.
“There is a planned protest at Hong Kong Airport. It is planned to begin at 1pm on 9 August, and continue throughout the weekend.
“The airport authorities advise that passengers should leave sufficient time for travelling to the airport, and check their flight status on the Hong Kong International Airport website.
Other protests are planned atWong Tai Sin and Tai Po on Saturday and Sham Sui Po and Hong Kong Island East on Sunday.
“You should be prepared that the situation around protests and public gatherings could change quickly, with the potential for significant violence,” the FCO warned.
“If you are in and around areas where demonstrations are taking place, you should remain vigilant, follow the advice of local authorities and move away quickly to a safe place if there are signs of disorder.”