The mother of the deceased girl, who had gone to the district hospital in Sagar for her treatment, was allegedly gang-raped by three sweepers in a toilet of the hospital premises on Saturday, police said.
Since the condition of the girl continued to deteriorate the doctors had referred her to Hamidia Hospital here, but she died on the way late last evening, they said.
The incident of gang-rape had come to light two days back, when the woman, along with her husband, filed an FIR with the Gopalganj police station.
Police said that the woman was gang-raped after three sweepers followed her to the toilet and raped her there.
According to the City Superintendent of Police Pramod Sonkar, all the three accused-- Rahul, Sunny and Sachin, had been arrested.