Hong Kong police searched public transport heading for the airport on Saturday ahead of another "stress test" of road and rail links by anti-government protesters, the latest in 14 weeks of sometimes violent demonstrations in the Chinese-ruled city.
Police dotted the main Hong Kong Airport Express station and searched at least one bus heading for the airport ahead of protests due to begin mid-afternoon.
Only passengers were being allowed into the airport building or to use the Airport Express, boarding in downtown Hong Kong.
The train was not stopping en route on the Kowloon peninsula.
The measures are aimed at