Mexican troops have captured one of the country's most wanted drug-gang leaders. Mario Ramirez Trevino, known as X-20, is said to be the head of the cocaine and marijuana-smuggling Gulf Cartel. It is the second high-profile arrest since President Enrique Pena Nieto came to power last December. The US government was offering a reward of $5m (£3.2m) for information leading to the capture of Mr Ramirez, while Mexico offered about $3m. Ramirez Trevino is thought to have taken over as leader of the Gulf Cartel after the arrest of Jorge Eduardo Costilla, known as The Coss, last September. Mexican media reported that the drug lord was arrested by a joint Army and Marines operation in Rio Bravo, in the northern Mexican state of Tamaulipas.