Sk Afshar Ali, the autorickshaw 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.
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 here yesterday.
Medical tests of the girl have been conducted, reports of which are awaited, the police said.