The girl was gangraped when she went to attend a marriage function along with her family members on May 30, police said.
The family members, who confirmed the incident, brought the girl to the Tata Main Hospital here for treatment last night but the authorities initially refused to admit her as it was a police case.
The police intervened following which the victim was admitted to the hospital, Superintendent of Police S Karthik said today.
Karthik said they were in touch with the concerned police station in neighbouring Purulia district of West Bengal where the incident occurred.