A 38-year-old rape and acid attack survivor from the Dalit community, faced her fourth acid attack here on Saturday evening in the compound of the hostel she is living in, though she has been accorded police protection. She suffered injuries on her face and chest.The woman, a mother of two, works at a cafe in the State capital run by acid attack survivors. She was admitted to the King George Medical University, and is being treated at the trauma centre.No FIR filedNo FIR has been registered yet, but the police are investigating the case.The victim was earlier attacked in March. Miscreants forced acid down her throat while she was on a train to Lucknow from her village in Rae Bareli.Chief Minister Yogi Adityanath had then visited her in hospital and announced an assistance of ₹1 lakh.On the Chief Minister’s direction, an armed guard was provided for her security round the clock.Additional Director-General of police, Lucknow, Abhay Kumar Prasad said it was likely that the woman was attacked while she was talking on the phone in the dark. “We have informed her relatives. Investigation has started,” Mr. Prasad said. S.N. Sankhwar, chief medical superintendent of the hospital, said the woman had received 10% burns on the lateral part of the right side of her face and upper part of the chest.“She is fine, her vitals are stable. The plastic surgeon and the critical cases department are treating the burns,” he said.The attack has raised serious questions about lapses in security. Police said the attack happened during the shift change of the two gunners who were assigned to guard the woman.SP Lucknow Sarvesh Kumar said the police would probe all angles, including the security lapse as the campus was a secured one. “The victim’s family has a long-running dispute with another family in Rae Bareli. We will explore that as well,” said Mr. Kumar.The police are also investigating the previous attacks on her and have rounded up the two men who were arrested — but later granted bail — in connection with the attack in March.The police does not have any CCTV footage so far and has been unable to track from where the miscreants entered the compound of the working women’s hostel in Aliganj locality.According to Stop Acid Attacks, an NGO working with acid attack survivors, the woman was allegedly gangraped in 2009.After she filed a complaint, the two accused allegedly physically assaulted her in 2011 and on December 25, 2013 attacked her with acid.