A popular candidate for governor of Tamaulipas State who had made increased security his prime campaign pledge was killed along with at least four others Monday morning when gunmen opened fire on his motorcade as he headed to a campaign event, the authorities said.

This was just two days after a "popular singer who often sang of the drug trade... was killed as he drove his red Cadillac Saturday night in Sinaloa State. Hours earlier, he had denied reports that he had been shot to death."