A 24-year-old man and a teenage girl have been arrested in London in connection with the suspicious death of a man, which police say is linked to an earlier alleged rape.

The body of Adrian Murphy, 43, was found at a block of flats in Lombard Road, Battersea, London, on 4 June.

A post-mortem examination carried out on 6 June failed to determine a cause of death.

The Metropolitan Police said property was stolen from the premises where Mr Murphy was found.

Their inquiries have linked the incident to an earlier allegation of rape at an address in Walthamstow, London, on 30 May.

The 40-year-old victim became unconscious after he was allegedly drugged by a man he met on a social networking site and invited to his flat.

He was found later that day by a friend and taken to hospital, but has since been discharged.

His flat had been ransacked while he was unconscious and the Metropolitan Police have said property including laptops, mobile phones and cash were stolen.

A 24-year-old man was arrested on suspicion of murder, rape and theft on 12 June.

He has since been bailed to attend a police station at a later date.

A 17-year-old girl was arrested earlier that day on suspicion of murder and theft and has since been released under investigation.

Detective Chief Inspector Rob Pack, from the Metropolitan Police said: "We have linked these two incidents through our suspects and our inquiries continue to establish the exact circumstances.

"We know the victim in the Walthamstow incident met the male suspect through a social networking site and we are investigating whether there is a similar connection in Mr Murphy's death.

"Both incidents happened over a short period of time and thorough inquiries have led us to make these prompt arrests.

"However, there is a possibility other offences may have been committed before 30 May."