The victim, who was admitted in a critical condition in a hospital at Bankhedi here, succumbed to her injuries two days ago, police said.
The woman, residing in Simaria village, had come to her mother's place in Dumar village where her neighbours identified as Hamid, Irshad Khan, Aashiq and Raees Khan took turns to assault her over an alleged property dispute, they said.
Later, the four men along with Hamid's wife set the girl on fire and threw her in front of her house.