Gunmen in a moving car shot and killed two leaders of the powerful Mexican Oil Workers Union Thursday night in the southeastern oil state of Tabasco, one day after gubernatorial elections in the state.

Tabasco state attorney Emanuel Antonio Zurita told reporters that "so far we have not established a motive. We cannot say anything nor can we talk about clues at this point."Oil Workers Union leader Lenin Falcon Mendez and his assistant Antonio Arcos Correa were killed by submachine gun fire in the city of Villahermosa, 400 miles southeast of Mexico City, in the state of Tabasco.

Zurita said the union leaders were assassinated as they drove home.