Passengers can change to another flight if they are delayed by longer security checks at Beijing Capital International Airport (BCIA) due to a recent ban on carrying liquids on domestic flights, The Beijing Times reported on March 17.

But airports in Shanghai so far haven't made such a move yet, local airport officials told Shanghai Daily via telephone.

Some passengers in Beijing missed their flights as they had to line up for security checks or taking time to switch items such as drinks and toothpaste from carryon bags to checked luggage, The Beijing Times reported.

The ban came after two suspected terrorists were caught on a plane flying from Urumqi in the Xinjiang Uygur Autonomous Region to Beijing on March 7.

The suspects, including a Uygur girl aged about 18, allegedly planned to ignite gasoline that they had smuggled onboard the China Southern Airlines flight.

The ban on liquids was also part of efforts to tighten security ahead of the Beijing Olympics, the General Administration of Civil Aviation of China (CAAC) has said.

Inspectors will open and check more hand baggage than before. "Easy boarding" services, where passengers pay for the privilege of speedier security checks and priority boarding, will be banned, the administration said.

Safety is the top concern for aviation services, the administration added.

The administration wants every vehicle entering an airport control zone to go through a security check. All airlines must guarantee they do not carry checked-in luggage if the passenger fails to board.

The Beijing airport has already set up a special security inspection channel for passengers who may be running out of time to catch their flights, the report said.

The airport authority also reminded people to get to the airport earlier if they need to check-in their luggage, the report added.