Hong Kong International Airport has cancelled all flights leaving thousands of passengers stranded as anti-government protesters occupied and caused disruption.
In a statement, officials blamed “seriously disrupted” operations.
More than 160 flights scheduled to leave after 18:00 local time (10:00 GMT) will now not depart.
It came after a peaceful rally in the city’s Victoria Park on Sunday afternoon turned violent after when protesters moved out of the area and marched along a major road despite a police ban.
A number of people, including a police officer, were injured in the clashes.
Videos on social media also showed officers storming enclosed railway stations and firing tear gas. Police officers were also recorded beating people with batons.