A 25-year-old woman was arrested by the Crime Branch's Anti Narcotics Cell (ANC) in Mumbai allegedly after being found in possession of 1.105 kilograms of mephedrone worth Rs 1.10 crore in the illicit market, an official said on Saturday.

She was held by the ANC's Bandra unit in a trap set up on Shaida Road in Dongri on Friday evening, the official added.