It was also revealed that the injured youth, who was sent for immediate medical attention, is one of the co-accused in the heinous crime.
Speaking to newsmen here, city DCP S Praveen Kumar said medical examination and the postmortem report indicated that the 45-year-old victim had been gang-raped and later strangulated by the accused.
"Two persons are arrested in this connection and they have confessed the guilt," the DCP said ruling out any further arrests in this connection.
After preliminary treatment, when they were returning to their slum, accused Naik and Mandei took the woman to the abandoned house and raped her in the afternoon.
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"When the victim protested, they killed her strangulating with the woman's saree," police said adding blood was oozing out from her face and nose.
"Both the accused have undergone medical examination and they would be forwarded to court tomorrow," the DCP informed.