MEXICO CITY - The death toll from clashes among inmates at a prison in the northwestern city of Mazatlan has risen to 28, up from an earlier total of 17, officials said Monday.
'We have confirmed 28 dead,' said a source in the Sinaloa state prosecutor's office.
According to a preliminary investigation, the fighting was a result of clashes between rival drug gangs.
Sinaloa is one of the most violent states in Mexico. Its is the turf of druglord Joaquin 'El Chapo' Guzman, the drug trafficker most wanted by the United States.