Child rights activist and theatre personality Zulfiqar Khan was sent to Burail jail after being remanded in 14 days' judicial custody on Saturday.
Police had arrested Khan for allegedly having "unnatural sex" with several people, including minor children, associated with his NGO Theatre Age last Saturday.
Khan is the director of Theatre Age, a non-governmental organisation that trains underprivileged children in fine art and theatre. The NGO has about 50 children enrolled for its programmes.
Khan was arrested from his office in Sector 24 last Saturday and booked under Section 377 of the Indian Penal Code (IPC) that relates to carnal intercourse against the order of nature. He was also booked under the Protection of Children from Sexual Offences Act (POCSO).
Police said they acted after Khan's former partner, Kanwarpal, filed a complaint with a photo that purportedly showed the activist in a compromising position with a child.
Kanwarpal had alleged: “I studied and worked with Zulfiqar Khan ever since Theatre Age was formed. In 2013, I saw Zulfiqar indulging in unnatural sex with children."