Doan Ngoc Minh (L) and Tran Duc Thuy Lien have been arrested for running a high-end sex ring

Police in Vietnam on Wednesday busted another upscale sex ring, arresting two alleged sex workers, one of whom was the first runner up of a local beauty contest.

The beauty queen, 21, was caught inside a hotel room Monday night in the northern province of Quang Ninh, police said, adding that the main procurer of the ring Doan Ngoc Minh was arrested in Ho Chi Minh City two days later.

She was the first runner up of a beauty pageant held last year at her university.

Another procurer, Tran Duc Thuy Lien, was arrested in the hotel’s lobby where she was waiting to collect service fees, which she later admitted to be between US$1,000 and $20,000 per client.

The two sex workers had flown from Ho Chi Minh City to the Hanoi and caught a taxi to Quang Ninh. They allegedly stayed at the hotel for two days for a fee of $7,000 per day.

Police are expanding their investigation into the ring, which they said involves many models and beauty queens.