Alejandro Arcos, the mayor of Chilpancingo, Mexico, was brutally murdered just six days into office, with his decapitated head found atop his car. His death marks the second high-profile killing in Guerrero's capital in a week,

The mayor of Chilpancingo in southern Mexico was murdered just days after taking office. Alejandro Arcos was decapitated, and his head was discovered on a truck. This follows the killing of city government secretary Francisco Tapia.

The gruesome killing represents yet another challenge for the country’s new president, who faces increasing pressure to show progress in the fight against violent cartels.