A man has been shot dead and a woman is in hospital following what police have described as a "deeply distressing incident" in a north London park.
Police and paramedics were called at about 19:00 BST on Wednesday to Clissold Park, Stoke Newington, where they found the pair, both in their 40s, with gunshot wounds.
The man was pronounced dead in hospital. The woman continues to receive hospital treatment but her condition is unknown.
Det Supt Oliver Richter said: "We are in the early stages of the investigation, but we believe the man and woman are known to one another and, at this time, we are treating it as an isolated incident and there is no wider risk to the public."
He added: "We understand this is a deeply distressing incident for those involved, the witnesses in the park and the community in the surrounding area."
The firearm has been recovered and a crime scene remains in place.
Police are trying to contact the relatives of those involved.
Hackney Council said the park would remain closed on Thursday morning and that it was "supporting the police with their investigations".