A man suspected of attacking and injuring a police officer in Hong Kong has been arrested during the early hours of Thursday at the airport.
It was unclear if the 24-year-old was leaving the city or working at the airport.
On Wednesday, the police had posted pictures of the officer after he was stabbed by "rioters" during protests against the new national security law.
Of the 370 people arrested on Wednesday, 10 people were in violation of the new security law.
The law targets crimes of secession, subversion, terrorism and collusion with foreign forces.
Trump says US needs to own Greenland to deter Russia, China
Kyiv scrambles to repair ruined power grid after Russian attack
Swiss prosecutors summon owners of ski resort bar after deadly blaze
Death toll in Philippines landfill collapse rises to 4
Australian bushfires raze homes, cut power to tens of thousands
