THREE hitmen who killed a Brit millionaire and his Thai wife with a hammer have taken cops to the kitchen where they "celebrated" the double murder.

Retired Alan Hogg, 64, and 61-year-old Nott Suddaen were found in two-metre deep graves behind their home in Phrae, northern Thailand, this week.

Nott's own brother, Warut Satchakit, 63, confessed to their murders along with hitmen Kittipong Kamwan, 24, and 63-year-old Phia Kamsai.

The trio were taken back to the crime scene today, and made to show cops where they buried the bodies.

Video footage shows Warut, dressed in a black top and jeans, with handcuffs strapped to his wrists as he points to the hole.

He is then joined by the younger man, Kittipong, who is wearing a pink shirt.

The group used Alan's own digger to make a deep hole before they were both thrown in - around two hours after they were killed at around 6pm on September 18.

The brother-in-law stopped and was grilled briefly by reporters but covered his mouth with his shirt and did not speak, before being bundled into a police truck.

Cops said they had been interrogating him all night and that he had confessed to murdering his sister by beating her with a hammer as Kittipong held her down in the garage.

The third man Phia Kamsai, 63 - the hitman who receive 50,000 baht (£1,170) to shoot Alan with a shotgun - arrived separately and was pictured sitting outside Warut's house in a white t-shirt.

Police Lieutenant General Poonsap Prasertsak said all three men had now been charged with premeditated murder and will be held in custody while prosecutors prepare the case.

Lieutenant General Poonsap added: "Today the two suspects returned to the scene to show how they buried Alan and Nott. All three men pointed to the scene.

"The interrogation has progressed and all three men have now confessed. The motive for this incident was personal problems between Mr Warut and his sister and her husband.

"Police are gathering more evidence and will extend the investigation to anyone who had contact with the men. The investigation will continue until it is resolved."