Three villagers were killed and two were injured when the roof of a slag pit collapsed in China's northeastern Liaoning Province, Xinhua quoted a local source as saying today. Three farmers from Chenxiangtun town in Shenyang city were buried and two were slightly injured when the mine's support frame gave way at 1:30 p.m. Saturday. At the time, 13 farmers led by Wang Enjun were illegally digging for iron at the Waitoushan mine in Benxi city, said a Benxi municipal government official on Monday. The slag pit belongs to the giant steelmaker Benxi Steel Group.