Workers try to clean up leaking oil at a stream in Cadereyta August 21, 2014. An oil pipeline spill that contaminated a river in the northern Mexican state of Nuevo Leon will take months to clean up, the country's top water authority said on Thursday. The 24-inch Madero-Cadereyta pipeline, owned by national oil company Pemex, was ruptured when thieves attempted to tap into it, the company said on Sunday. David Korenfeld, head of Mexico's national water commission, said that residents near the contaminated parts of the river, located about 40 kilometers (25 miles) from the state capital of Monterrey, were advised not to consume the water. REUTERS/Daniel Becerril (MEXICO - Tags: DISASTER ENERGY ENVIRONMENT POLITICS BUSINESS)