The 35-year-old woman was attacked in Naubatpur police station area of rural Patna on Wednesday evening when she had ventured outside her home, superintendent of police (city), Patna (west), Ravindra Kumar said.
She was rushed to a local hospital when she returned home bleeding profusely and was later transferred to Patna Medical College Hospital, where she died late last night, he said.
Hospital superintendent Lakhendra Prasad said the woman had died of excessive bleeding. But whether she had been raped would be confirmed only after post mortem.