A man has been arrested after a woman was fatally stabbed at a residential address in Southwark.
Police were called by the London Ambulance Service to a property on John Ruskin Street in Camberwell at 04:20hrs on Tuesday, 1 January to a report of a stabbing.
Officers attended and found a woman, aged in her early 30s, with stab injuries.
Despite the efforts of paramedics, she was pronounced dead at 04:50hrs.
Her next of kin have not been informed. Formal identification is yet to take place.
A post-mortem examination will be held in due course.
Detectives from the Homicide and Major Crime Command are investigating.
A man, aged 34 [A], was initially arrested at the scene on suspicion of attempted murder. He has been taken to a south London police station where he remains custody.
Enquiries continue.
Anyone with information is asked to contact officers via 101 quoting reference 2651/1Jan.
You can also call Crimestoppers anonymously on 0800 555 111 or tweet police via @MetCC