A man has been arrested on suspicion of attempted murder after two people were stabbed in the early hours of Good Friday.
Surrey Police were called to the attack, in Hook Road, Epsom, at 4.35am, on April 18, following reports of a serious assault.
Officers found that an 18-year-old woman and a 22-year-old man had suffered stab wounds.
They were taken to St George's Hospital, in Tooting, with serious injuries which were not life-threatening.
A 19-year-old man was arrested at the scene and was taken to hospital with head injuries he sustained during the attack.
He was later sectioned under the Mental Health Act and has been transferred to a secure hospital while he remains on police bail.
A police spokesman said that the investigation is at an early stage and detectives are currently carrying out a number of enquiries to establish the full circumstances surrounding this incident.
He said: "At this stage, this is thought to be an isolated incident and there is nothing to suggest any wider threat to the local community.
"Officers from the local safer neighbourhood team are assisting the investigation and carrying out patrols in the area to provide reassurance to local residents."
Epsom artist Peter Mugridge said: "All day Friday and Saturday the house was taped off with crime scene tape and two police vehicles outside."