The body of a British man who went missing after he was spotted in an "increasingly heated" argument with an unknown man has been found on a beach in .

Regan Kelly, 28, disappeared shortly after an explosive row with the person in question. He had not been seen since January 3.

The incident, which occurred outside a hostel bar on the Thai island of Phuket, was captured on CCTV.

The pair had reportedly been chatting for several hours before they appeared to break into an argument in the video, which has no audio.

His sister, Laurie Blackall, said Kelly got up and left before heading to Patong beach, with the other man coming after him.

The last bit of footage from the seafront, which police shared with the family, reportedly shows the other man tailing Kelly.

The man on the chase was reportedly wearing a white t-shirt and shorts, and has been described as "muscly".

Kelly, a building surveyor from Selsdon, was found the next day by a watersports instructor face down naked in the water off Patong.

The devastated family are now searching for answers about what happened to Kelly in his final hours.

His sister told the Mailonline: "The detective said he has worked tirelessly but I just don't know if they want to make it out like it was a tragic accident."

She later added that their "main focus is getting him home ASAP and continuing to work out what happened, because for us there isn't any closure, this isn't a closed case."

This is not the only mysterious death of a British tourist in recent days.

The devastated sister of a missing father in Benidorm has said her "heart is broken" after a body was found by police.

John George, also known as John Hardy, went missing on December 18 after failing to catch his flight home to spend Christmas with his two sons, aged 6 and 13.

The devastated sister of a missing father in Benidorm has said her "heart is broken" after a body was found by police.

John George, also known as John Hardy, went missing on December 18 after failing to catch his flight home to spend Christmas with his two sons, aged 6 and 13.

Spanish police sources claim an arrest has been made after a body thought to be that of missing John, 37, was found on the Costa Blanca.