It said an area of the airport had been set aside for demonstrations, but no protests would be allowed outside the designated area.
A few dozen protesters remained at the airport early in the day while workers scrubbed it clean of blood and debris from overnight.
The move comes as the USA and China spar in a protracted trade war and American lawmakers criticize the Hong Kong police's tactics against demonstrators who have protested for more than two months.
The violence came after Hong Kong's Airport Authority announced that all check-in services would be suspended for another night, due to terminal operations being "seriously disrupted".
Police fired tear gas at the blackshirted crowds in districts on Hong Kong island, Kowloon and the New Territories.
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Check-in counters were closed again at 4:30 p.m., while incoming flights into Hong Kong were not cleared for landing.
Two U.S. Navy warships were denied port visits to Hong Kong by the Chinese government amid a deepening political crisis as a result of anti-extradition bill protests that have swept the former British colony over the past 10 weeks. Activists have clashed with police while demanding that China not whittle away at the freedoms it does not share with the mainland under its "one country, two systems" model of governance.
In the incident, police have arrested five people for offenses including unlawful assembly, possession of offensive weapons, assaulting police officers and breaching of the peace.
The Global Times reported on Monday that China's People's Armed Police assembled in the southeastern city of Shenzhen, fuelling speculation of a possible intervention in Hong Kong.
Some reactions on China's social media platforms called for Beijing to intervene while many others urged calm.