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BEIJING  -- Beijing subway passengers will face security checks by machines, police or dogs at all subway stations from June 29 to September 20, the local authority said on Friday.

Guns, ammunition, controlled knives, inflammables, explosives and radioactive and poisonous articles will be the focus of the checks in the capital, the host city for the Olympics on August 8-24 and the Paralympics September 6-17, a subway spokesman said.