Sk Afshar Ali, the auto-rickshaw driver, was arrested after the hearing and speech-impaired girl identified him as the perpetrator of the crime, police said today.
The girl had left her home to buy groceries from a local shop yesterday morning, but when she did not return after a while her family members suspecting something amiss went looking for her.
The family raised an alarm after hearing groans from inside a house which belonged to a relative of Ali.
Locals along with the family members broke open the door and found the girl tied to a cot in a semi-clad state.
According to the complaint filed by the victim's family, Ali had allegedly lured her to the house and sexually assaulted her.
The accused was arrested from a hideout in Kolkata yesterday.
Medical tests of the girl have been conducted, reports of which are awaited, the police said.