AlHijjah 18, 1432, Nov 14, 2011, SPA -- Four workers were killed while six others remain hospitalized after they were poisoned by carbon monoxide on Monday in eastern Jiangxi province. The incident happened around 11:30 a.m. in Jiangxi Yadong Cement Company in the city of Jiujiang, Xinhua quoted the local government as saying. A lack of oxygen was blamed, as the poisoned workers were working in a warehouse crammed with pulverized coal, said an official with the local information office, who cited an initial investigation.