The Hong Kong International Airport has limited its express train services ahead of the latest series of planned protests targeting the airport.
In a statement, authorities said only people holding valid flight tickets will be allowed to enter the terminal, with boarding from certain stations suspended for the day.
Officials also warned against using fake boarding passes, air tickets or flight booking information to enter the airport's terminal buildings, saying that "such behaviour could amount to forgery or using a false instrument".
It comes after a night of violent street clashes between the riot police and protesters.
US lets flights resume at El Paso airport after brief security halt
Ten dead after shooter opens fire at high school in Canada
Tropical cyclone Gezani slams into Madagascar, killing nine
Russian strike kills father and three children near Ukraine's Kharkiv
Cambodia says it has closed almost 200 scam centres in fraud crackdown
