ARAPAHOE COUNTY, Colo. -- A local massage parlor could be shutting down for good after it became part of a crackdown by Denver police.

An undercover investigator went to the location in the 1800 block of South Parker Road and said he was propositioned. That's when he called for additional officers.

It was the second time in less than a year the Bali Spa has been raided, 7News reported.

Six women of Korean descent were taken into custody Tuesday night. Two of them were arrested on charges of keeping a place of prostitution, two were arrested on charges of prostitution, and two were detained on immigration violations.

The two women arrested on prostitution charges were identified as Yang Senga, 37, and Nyong Toups, 50. The two arrested on charges of keeping a place of prostitution were identified as Michelle Chin Schramm, 50, and Yucha Kwan Heberling, Yucha, 38.

Police said there were three males in the business at the time of the raid but there was not enough evidence to hold them. They were questioned and released.

Investigators also found $6,000 in cash inside the business.

Arapahoe County Sheriff Grayson Robinson said he will pursue charges of public nuisance to close the Bali Spa down.

Last October, authorities busted 15 massage parlors in the metro area and made 35 arrests, as part of a crackdown on massage parlors offering prostitution to clients.