Security has been tightened on the capital's subway lines to ensure a smooth run-up to the Beijing Games.

Passengers receive security check at a subway station in downtown Beijing, China,June 29, 2008.

This is the newly set up lane for a security check on Beijing's subways. More than 3000 security staff will make sure passengers are not carrying illegal or dangerous items onto the trains.

Jia Peng, Publicity Chief, Beijing Subway, said, "The main items banned from public vehicles are handguns, ammunition, knives, flammable and radioactive goods, and toxic items. Because they pose a potential threat to public security."

Liquids including bottled water are also items to be checked. This machine can sort out water or other liquids carried in bags. Most passengers say they support the new measures.

Passengers receive security check at a subway station in downtown Beijing, China,June 29, 2008.

Passenger said, "This is necessary for the security of the Beijing Olympics."

Another passenger said, "I think the new measures are pretty good. It serves the general interest of Beijing residents."

Beijing subway officials say all large suitcases will be checked and spot checks will be done for smaller bags.

Passengers found carrying suspicious items must voluntarily open their bags for further examination.

Officials hope the new safety measures will not hold up passenger flow.

(CCTV July 1, 2008)