Mexico City, Mexico (CNN) -- The former governor of Colima state in southwest Mexico was killed Sunday by unidentified gunmen, state media reported.
Silverio Cavazos Ceballos was shot outside his house in the city of Colima, which has the same name as the state, the Notimex news agency reported. He was transported to the private San Francisco clinic, where he died, Notimex said.
Cavazos Cevallos became governor in an April 5, 2005 special election after Governor Gustavo Vazquez Montes died in a plane crash on February 24. Cavazos Cevallos turned over the post to his successor on November 1, 2009.
No motive for the killing was immediately given, but Mexico has undergone a recent spate of killings of current and former politicians. At least 14 mayors have been killed in Mexico this year, and a leading gubernatorial candidate in Tamaulipas state, Rodolfo Torre Cantu, was gunned down in June.