The mayor-elect of Martires de Tacubaya, a city near the border with Guerrero in the southern Mexican state of Oaxaca, was gunned down by hitmen working for drug traffickers. Eleven mayors have been murdered in Mexico this year, and officials say most of the killings are part of the drug prohibition violence that has claimed more than 28,000 lives nationwide since late 2006. The two suspects arrested in the case told investigators they were paid $6,000 to kill the mayor and one of his assistants.