Soldiers burst into a Thai brothel last night to find a man having a threesome with two young prostitutes in a Jacuzzi.

The western man, who has not been identified, was drinking at the Rioja club in Pattaya when the raid was carried out.

He had taken the women, who were in their 20s, to a private room and paid around 3,000 baht - the equivalent of £70 - for an hour in the hot tub with them.

The man was found naked in the hot tub with two prostitutes in their 20s when police and army officers burst in

He had paid £70 to spend an hour in the private room with the two women, unaware that authorities were targeting the club

But authorities, who have recently banned new strip clubs from opening in the city, were at the same time continuing their raids on bars to root out prostitution.

Police and army officers found 15 sex workers downstairs drinking with customers, one having sex on a bed upstairs, and in the last of the ’short time' rooms the western tourist in a bubble bath.

He was drinking beer, smoking a cigarette and receiving oral sex from one naked woman while another watched.

Undercover officers initially entered the club and confirmed that sex was available by offering 3,000baht for a girl

Police chiefs have said that officers will continue to target the sex trade in Pattaya, which is described as a 'resort for families to enjoy'

Pattaya police chief Colonel Apichai Klobpetch said: 'This was another successful operation. We cannot allow this in Pattaya.

'This is a resort for families of every age to enjoy. We will continue more operations to clean the area.'

Undercover officers initially entered the club and confirmed that sex was available by offering 3,000baht for a girl.

After raiding the club, they found codoms, lubricant and other sex toys on the premises.

A 52-year-old woman who claimed to be in charge of the business was arrested and taken in for questioning.