The main accused, 22-year-old Jagdish Solanki and his friends Rajesh More (22) and Rahul Salve (19) were arrested yesterday in connection with the crime that took place on August 4, police said.
According to police, Solanki had befriended the teenager school girl on Whatsapp. He invited her to a mall near Teen Hath Naka area on Monday evening to celebrate friendship day.
"When she went to the spot, Solanki threatened her that if she did not follow his instructions, he would upload her objectionable photographs on social networking sites.
Solanki took her to a nearby shanty, where he first forced her to drink liquor and then raped her, while his two friends kept guard outside the hut," Police Inspector Sulabha Patil of Wagle Estate police station said.
The trio has been booked under sections of the Indian Penal Code as well as Protection of Children from Sexual Offences (POCSO) Act, police said.