A 29-year-old man was arrested for allegedly trying to extort Rs 50,000 from a teenage girl by threatening to circulate her private pictures on social media, police said on Saturday.

A complaint of stalking and sexual harassment was registered at the Farsh Bazar police station in Shahdara area of northeast Delhi regarding the 13-year-old girl, from whom the suspect demanded Rs 50,000 for not uploading the photos or video on social media, police said.