A gay couple were attacked in their London home on Tuesday, leaving one dead and the other in hospital with stab wounds.
Police were called to reports of an assault in a flat in a converted house in Page Heath Villas, off Bickley Road, Bromley in South London at around 8pm.
They found the body of a 59-year-old man, named by local press as Gerry Edwards.
He was pronounced dead at the scene.
His partner, a 56-year-old man, remains in critical condition in hospital.
The investigation is being led by the Homicide and Serious Crime Command, based at Lewisham.
DCI Cliff Lyons said:
“The location of the murder is near a busy road in the borough of Bromley.
“It is largely residential and I would have expected there would still be traffic either going past or from residents arriving home.
“Police are keen to trace a white man, possibly in his 40s, who may have been in the area at the time. At this stage I do not know if he is a witness or a suspect.
“We are keeping an open mind regarding a motive for the attack. We have found no evidence of a break in and we are not ruling out that it may have been a homophobic attack.
“I want to hear from anyone who was in the area at the time, who may have seen or heard anything suspicious.
“Did you see a man running away or a car leaving the scene which may have drawn your attention?”
Anyone with any information should call the incident room on 020 8721 4961 or Crimestoppers on 0800 555 111 to remain anonymous.