A woman who was found dead in a flat by detectives investigating a rape allegation was murdered, police said.
Police sealed off Marlow House for forensic examination
A post-mortem examination on Tuesday revealed the middle-aged woman, who had still not been formally identified, had died from stab wounds.
Bedfordshire Police made the discovery after they had gone to the flat in Marlow House, Marlow Avenue, Luton, following a claim by a different woman that she had been held captive and raped.
The woman told officers she was kidnapped at knifepoint by a stranger who got into her car in Osborne Road, Luton, at 1715 GMT on Monday.
Body in another room
She was forced to drive to the flat at Marlow House where she told police she was raped.
Unknown to her, a dead woman was in another room while she was being attacked.
The rape victim managed to talk her attacker into letting her go at about 1840 GMT on Monday and she went straight to the police.
She was able to identify the flat when officers took her back to the area.
A search warrant was granted, and at 0046 GMT on Tuesday, police broke into the property to discover a dead woman.
Two men arrested on Tuesday in connection with the death have been released without charge. A third man is still being questioned at Dunstable police station.
Bedfordshire Police are appealing for anyone who may have seen a man, described as black, six feet tall with short hair, in Osborne Road before the abduction on Monday.
They also want to hear from anyone who has any information about what happened in the flat.