The raids were carried out in the southern and central part of Kolkata by the anti-human trafficking unit of the city police on Saturday night, Joint Commissioner (crime) Murlidhar Sharma said.
Eight persons, including the brothel manager, were arrested and seven sex workers were removed from a third floor flat on Prince Anwar Shah Road under Jadavpur police station.
Nine customers, 10 sex workers, one manager and two pimps were found during a raid and search at the Sweet & Shower Family Saloon and Spa on Bhagwan Mahavir Sarani under Bhawanipore police station. A brothel was being operated from the spa.
The sex workers were removed as victims and the others were taken into custody.
During the third raid, two customers, the brothel owner and the manager were arrested from the first floor of a Rashbehari Avenue premises under Gariahat police station. Six sex workers were removed.
The police also raided the Guys and Dolls Beauty Parlour, which was also being used as a brothel, in central Kolkata's Mirza Galib Street under New Market police station and arrested the brothel manager, two pimps and three customers. Six sex workers were removed.
Cases under Section 120B (criminal conspiracy) and relevant sections of the Immoral Trafficking (Prevention) Act have been lodged against the accused in the respective police stations.
( With inputs from IANS )