The incident took place last Friday at the top floor of the hospital facility. (Picture for representation)

Mumbai Police arrested a man posing as a security guard for allegedly raping a 37-year-old woman at the civic-run Sion Hospital, an officer said on Tuesday.

The victim, who is also an HIV-positive, was taking care of her sister admitted at the hospital, who is suffering from kidney issues. The accused has been identified as Deepak Annappa Kunchukurve (31), a resident of Dharavi area.

According to the police, the incident took place last Friday at the top floor of the hospital facility.

Deepak approached the victim and struck a conversation with her claiming he was a security guard. He asked the woman if she were facing financial difficulties, to which she said that she was.

The accused told her that there is a department where she had to fill a form if she wanted concession in medical bills, police said. He then lured her to an isolated area at the terrace on pretext of showing her the department.

The victim, a housewife from Pune, tried her best to escape even as she was physically weak due to her illness but the accused managed to sexually assault her.

The woman immediately rushed to Sion police station and filed an FIR. Police started an investigation right away and arrested the accused based on the CCTV footage in less than 24 hours.

Senior police inspector Lalita Gaikwad at Sion police station said, "Based on the CCTV footage and local intelligence we have arrested the accused. He was produced in court and remanded to police custody."

The incident raises questions on the security of the hospital as Deepak was posing as a hospital staffer and doing other odd activities there.

The hospital is equipped with security from the Mumbai Security Force (MSF) and Brihanmumbai Municipal Corporation (BMC) security guards, both of whom failed to prevent the rape or nab the accused.

While the accused has been booked under Indian Penal Code Section 376 (rape) and a probe is underway, an internal inquiry has also been initiated at Sion Hospital.