BEIJING, Jan. 2 (Xinhua) -- Police dogs began regular patrols in Beijing's crowded subway stations on New Year's Day, sniffing for incendiary substances carried by passengers.

    "The police dogs have been trained to be comfortable with the crowded environments and slippery surfaces of subway stations," said Wang Ning, a deputy head of the detection detachment of the Beijing Traffic Police Division of the Beijing Public Security Administration.

    He said eight dogs are on patrol at five downtown subway stations, including those that serve the central landmark, Tian'anmen Square.

    "More dogs will join the patrols later. We only use small species, such as Labrador retrievers and spaniels, for their communications and people skills," said Wang.

    The administration has stepped up attempts to detect any incendiary devices or explo...

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