Thirty-four people were arrested on Monday for working illegally in different parts of Hong Kong’s Kowloon peninsula.

After an investigation prompted by a tip-off, an operation code-named “Powerplayer” was carried out by officers from the police force, immigration department and labor department in various districts, including Tsim Sha Tsui, Yau Ma Tei, Mong Kok, Sham Shui Po, Cheung Sha Wan, Kowloon City and Hung Hom, the Oriental Daily reported.

A total of 24 men and ten women aged between 23 and 60 from mainland China, Pakistan, India, Indonesia, Vietnam and Bangladesh were arrested during the raids.

They were arrested for drug trafficking, using forged identification documents, illegally entering the city, overstaying, breach of conditions of stay and hiring illegal workers. All of those arrested were detained for further investigations.

Meanwhile, at the Shatin Magistrates’ Court on Monday, four asylum seekers who pleaded guilty to working illegally were sentenced to 15 months’ imprisonment, according to a government release.

One male Bangladeshi and two male Pakistanis, aged from 39 to 41, were arrested when enforcement officers raided two recycling sites in Pat Heung in Yuen Long in March where they were working as recycling workers.

Another female Bangladeshi illegal worker, aged 34, was arrested when she was washing dishes in a restaurant in Tai Wo, the New Territories.

Asylum seekers are forbidden from taking up any employment in Hong Kong.