The 33 year-old woman, and her two-year-old daughter were travelling in a taxi from the city of Mathura where they live to New Delhi last Thursday when she was allegedly raped by the driver.
The driver drugged the woman at some point during the 150-kilometre journey and she was attacked after she passed out, Delhi police spokesman Rajan Bhagat told AFP.
She woke up on a bench outside a railway station in New Delhi with her toddler crying by her side, the officer said, adding that details of the attack were still unknown.
"It is still a bit unclear, but prima facie, it seems she sat (in the taxi) voluntarily. But yes, thereafter, in the car he drugged her using some spray...medical report has confirmed rape," he said.
The driver drugged the woman and raped her when she passed out
The woman reported the incident to police who are searching for the driver, Bhagat said.
She is a devotee of the Hindu god Krishna, and had been living in Mathura in Uttar Pradesh state, for the past three years, and worked in the cloth export business, he said.
She and her daughter had been waiting on a busy road in Mathura for a taxi to take them to the capital when the driver approached.
With agency inputs