THE family of a Southampton man murdered in the Thai resort town of Pattaya have been left "devastated" and say they have no clue as to why he was targeted.

Tony Kenway, who is originally from the city and attended St Monica Primary School in Bay Road, was shot dead while sat in his top-of-the-range Porsche after leaving the gym at Sanit Sport Club at about 10.30am yesterday - about 3.30am in England.

READ: Southampton man shot dead in daylight attack in Thailand >>>

According to Thai reports, it is believed the 39-year-old web designer, who lives in Bangkok, was killed as part of a gangland dispute.

CCTV was released of the execution which shows a man following the Mr Kenway across a car park to his red Porsche before shooting him while he sat in the driver's seat.

According to reports, Mr Kenway was happily married to 32-year-old Somporn Kenway, also known as Pans, and had become a father for the fourth time.

Mr Kenway had two children with his wife - a three-year-old daughter and a four-month-old baby son - as well as a ten-year-old step-son in Spain and a nine year-old son.

Mr Kenway's sister, Kirsty Kenway, of Southampton, is reported to have said: "I don't really know what happened to my brother.

"He had a brilliant life out there and he did a lot for charity and helped build some schools. He had even met the future king of Thailand. He was very clever and did very well.

“We speak quite regularly and I visited him over Christmas. We had an amazing time, taking the kids to water parks and he spent a lot of time with his niece.

“He loved being with his family. He absolutely adored his kids and he enjoyed playing with his baby son and he just made sure he looked after his children.

“He had a brilliant life out there and he did a lot for charity, and helped build some schools. He had even met the future King of Thailand.

“Pans is brilliant and she was the light of his life. She’s devastated by what’s happened.”

Mr Kenway's murderer was wearing dark clothes and was seen, on the video, pulling something out his black jacket.

It was reported that the man, who concealed his face, was seen running away after the incident to a waiting motorbike with a registration number plate 7992 and speeding away.

According to the Bangkok Post, police collected a single bullet cartridge case and a cigarette butt from the crime scene for examination.

Sanit Sport Club released a statement on its facebook page which said: "We are very sad to announce the death of Tony Kenway who lost his life this morning.

"We would like to offer Tony's family and friends our deepest sympathy and condolences at this difficult time.

"RIP Tony."

A Foreign Office spokeswoman, said: "We are in contact with the family of a British man following his death in Pattaya, Thailand. Our sympathies are with them at this difficult time. We are in touch with the local police."