According to police, six boys from Santosh Nagar area in Goregaon had on Friday asked the victim to join them for Diwali celebrations.
As she knew the boys, she went with them. The boys took her to an isolated place before offering her a spiked soft drink. While she lost consciousness, four of the six boys--all of them in their 20s --took turns to rape her.
Shocked, the girl kept quiet till Sunday and later narrated the ordeal to her grandmother. Subsequently, the girl along with her grandmother went to Dindoshi Police Station where an FIR was registered yesterday.
On Sunday, the girl, who is an eighth class drop-out, was sent to Bhagwati Hospital where she underwent medical examination and the report will be ready soon, police said.