One of Mexico's and the US' most wanted drug lords, Jorge Eduardo Costilla Sanchez, also known as 'El Coss', has been captured by Mexican marines in the northern state of the country.

Mr Costilla, a former police officer and suspected Gulf cartel leader, is on the government's list of the 37 most wanted drug lords with a reward of more than 1.2m on his head. His capture follows the arrest last week of the suspected head of a rival Gulf faction, Mario Cardenas Guillen. The Gulf cartel has been engaged in a bloody battle with the Zetas drug gang for trafficking routes into the US. So this capture is quite a prize for the Mexican government and their war on drugs.

The latest arrests come during the final months in office of President Felipe Calderon, who launched a crackdown on the cartels in 2006. Combating drug-related violence will be one of the main challenges for President-elect, Enrique Pena Nieto, who will be sworn in on the 1st of December.

The Mexican Navy have said more details will be issued shortly.

Written and presented by Ann Salter.