Two men have been arrested in connection with what may have been a homophobic murder.
Gerry Edwards, 59, was stabbed to death and his partner Chris Bevan, 56, was also stabbed at Page Heath Villas, Bromley, in south-east London.
Mr Bevan remains in a critical condition in hospital. Police have yet to speak to him.
A 46-year-old man has been arrested in connection with the incident and remains in police custody.
A 59-year-old man also arrested in connection with the death has been released on police bail.
It is understood Mr Bevan told neighbours before he collapsed that the attacker had shouted homophobic abuse.
Det Ch Insp Cliff Lyons said: "Gerald Edwards was stabbed to death inside his own premises.
"A person inside the premises came to his aid - a man called Chris Bevan.
"He received multiple stab wounds and he is currently fighting for his life in a south London hospital.
"He has been clinging on to life for the last 30 hours.
"A man came to the premises, it would appear, and from the information given by one of the surviving victims, it was a homophobic attack."
He added the murder scene was near a busy road in a largely residential area and he appealed for any witnesses to come forward.