The operation was carried out in an apartment in the plush Koregaon park area on Monday night on a tip-off by a local municipal corporator and with the help of a decoy customer, said Bhanupratap Barge, Inspector, social security cell of Pune police crime branch.
The detained girls, aged between 19 and 25, included one each from Uzbekistan and Nepal and seven from Bangladesh. Three Indian girls included one from Delhi.
Police who suspect involvement of an inter-state racket in the running of the brothel said the Uzbek girl was believed to have been staying in the country for a long time as she spoke fluent Hindi.
A court remanded the five accused, arrested under Prevention of Immoral Trafficking Act (PITA), to police custody till January 31.