The nine-year-old from Karimganj had gone to visit her grandfather in Pechachora village under Kallain police station of Katigora sub-division when she was kidnapped by two unidentified persons, with their faces covered, last evening, they said.
The girl was taken to a house in Section 9 of Kallain Tea estate and gangraped before being abandoned in the tea garden outside the house.
Tea garden labourers returning from work found the girl crying and rushed her to a hospital in a critical condition from where she was later shifted to Silchar Medical College Hospital.
A massive search operation has been launched to nab the rapists, who are absconding, police added.