Six people were confirmed dead and four others were injured when a ramp bridge linking to a north China expressway collapsed early Wednesday, Xinhua quoted the local government as saying. Five trucks fell off the ramp bridge, about 800 meters from a toll station near Tianjin port, when the accident happened at 1:33 a.m., a city government spokesman said. The accident has closed down the Tianjin section of the pivotal expressway linking to the northern Shanxi Province and caused congestions in the downtown areas.