Two men and two women are in hospital after being stabbed.
The four people, all aged between 21 and 25, were found by police officers in Arnal Crescent, Wandsworth, just before 4.30am this morning.
They were taken to hospital as a priority with multiple stab wounds.
No arrests have yet been made, police are investigating.
More to follow.
Did you see it happen? Contact the newsdesk on 020 8722 6344 or email arucki@london.newsquest.co.uk
Do you know more? Contact the newsdesk on 020 8722 6344 or email arucki@london.newsquest.co.uk.
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