Two foreign women, a mother-daughter duo, were arrested by customs officials with nearly 5 kg of heroin worth Rs 25 crore at the Chhatrapati Shivaji International Airport, an official said.

The contraband was concealed in the cavities of the trolley bags carried by the mother-daughter duo, who had travelled to the city on September 19 from Johannesburg via Doha in a Qatar Airlines flight, the official said. Their nationality was not disclosed.