Reportedly the plan was to kill Chaiyong but his wife, Wanpen Maneerungsakul, 48, intervened and was shot in the torso.
The shooting took place at about 8.40am in tambon Prik in Songkhla’s Sadao district.
Police were waiting to speak to Chaiyong yesterday.
It was reported that Chaiyong had a gasoline business. He was also an adviser to a local newspaper and served as a member of subcommittee dealing with southern border problems.