A case has been registered against an unidentified person for allegedly raping a woman after rendering her unconscious onboard an express train in Maharashtra`s Thane district, an official from the Government Railway Police (GRP) said on Friday, reported the PTI.

The victim has alleged that she was travelling by Uttar Pradesh-bound Tulsi Express on March 10 when an unidentified person administered a harmful substance to render her unconscious and allegedly raped her, the official said, as per the PTI.