A hunt is under way for a man suspected of murdering a prostitute and attacking another.
The body of Maria Duque-Tunjano, a 48-year-old Briton originally from Colombia, was discovered at a flat in Earls Court, west London on Friday.
Police are searching for Robert Richard Fraser in connection with her death, and also believe he may be responsible for an attack on another sex worker in Paddington.
Fraser is also known as Robert Aleem and Shia Robert Jackson, and Scotland Yard says that anyone who sees him should call 999 immediately.
Officers were called to a flat in Earls Court Square at 1pm on Friday where they found the body of Ms Duque-Tunjano, who was from Streatham.
Police said her body had been there for a number of days, and a post-mortem examination on Saturday found she died from being hit over the head with a blunt object. Her next of kin have been informed.
Inquiries established that Ms Duque-Tunjano was a prostitute who used the flat for her work. Police believe she was robbed of cash during the assault.
They are now linking the murder to another attack on a sex worker in Paddington on January 18, when a woman in her 20s was assaulted and robbed by a man, though not seriously injured.
Detective Chief Inspector Nicola Wall said: "We have established that Maria was last seen alive on Tuesday, January 28. We also understand she was in the company of a man and our primary focus is to trace him as part of this investigation.
"It is now our belief that this man was also responsible for an attack on another female sex worker in Paddington. It is imperative that we trace him as soon as possible.
"We have spoken to organisations with links to those who work in the sex industry to make them aware of this incident and pass on the message that personal safety of sex workers is of paramount importance."
Anyone with information has been asked to call police 020 8785 8244 or Crimestoppers on 0800 555 111.