The Thane Railway Police have lodged a case against an unidentified person for allegedly molesting a 18-year-old woman on an Mumbai-bound express train, Railway Police said on Monday.

The police are also scanning CCTV footage for identifying the alleged assailant.

The victim tweeted to police about her “harassment by an unidentified molester” while she was travelling in the Konark Express, said Senior Police Inspector Uttam Sonawane of Thane Railway police station.

“Following the tweet, a case under section 354 (assault or criminal force to woman with intent to outrage her modesty) of the IPC was registered. Police visited her residence in Nallasopara (in neighbouring Palghar district) and recorded her statement,” the officer said quoting the tweet.

The accused boarded the train at Thane station, allegedly touched the woman inappropriately and tried to push her out, another police official said, adding that the alleged incident occurred near the basin in the compartment.

The man fled after the woman raised an alarm, following which other passengers rushed to her aid.

According to media reports, the woman is a native of Nallasopara suburb of Mumbai and was traveling from Bhubaneswar.