Gunmen killed a city vice mayor in the Philippines on Saturday, police said, less than a week after two mayors were shot dead in separate incidents, including one President Rodrigo Duterte said may have had links to illegal drugs, Reuters reports. Police said there was no clear connection between the slaying Saturday of Alexander Lubigan, vice mayor of the city of Trece Martires in south of Manila, and the killings of two mayors just days before. A controversial Philippines mayor who gained notoriety for parading people arrested on drug offenses was shot and killed by a sniper at a flag-raising ceremony at Tanauan City Hall last Monday. A day later motorcycle-borne gunmen assassinated Ferdinand Bote, a mayor in a town north of the Philippine capital.