Stealing oil from PEMEX and selling it illegally has been one of the many funding activities of the Gulf Cartel. They were reported to have stolen around 40% of the oil products in 2011 in northern Mexico and then selling it illegally in Mexico and in the American black market. One leader of the Gulf Cartel confessed after his apprehension that "drug trafficking is their main business, but due to the difficulties they have been encountering, oil theft has been an important financial cushion" for the cartel. They have also been reported to steal vehicles.