Two women from Vietnam, an asylum seeker and an illegal immigrant, were sentenced to 15 months in jail by the Sha Tin Magistrates’ Court on Monday after they were caught working illegally in a restaurant in Kowloon.

The women, aged 50 and 47, were arrested in a restaurant in Hung Hom on Sept. 20 during an operation conducted by the Immigration Department, according to a government release.

They were found performing kitchen work and washing dishes when officers raided the restaurant. After doing an identity check, immigration officers found one of the women was an asylum seeker, who was not able to work in Hong Kong during her temporary stay in the city.

The other woman was found to be an illegal immigrant. She was also suspected of using a forged identity card. Both women pleaded guilty to the charges at the magistrates’ court on Monday and were sentenced to 15 months’ imprisonment.

Two employers suspected of hiring the illegal workers were arrested and an investigation is ongoing.