A third teenage boy has been arrested after five teenagers were stabbed at a Halloween party.

Police said they were called shortly after 22:30 GMT on Saturday to Park Road in Chandler's Ford, Hampshire, where an "unknown group" had gained entry to the event.

One 17-year-old boy remains in hospital in a life-threatening condition. The others have been discharged from hospital.

A 16-year-old from Bristol has been arrested on suspicion of attempted murder. He remains in custody, as do two boys arrested on Monday.

Two witnesses told the BBC a fight started after a group came in over a garden fence, although they said the motive for the stabbings was unclear.

One of the teenagers said: "I was [standing] in the hallway near the exit and I saw someone I know pull up their shirt and say 'I've been stabbed'.

"And then I later saw him lying outside the front of the house with someone compressing his wound."

Police cordoned off parts of Park Road and the adjoining Valley Road.

Hampshire Police said officers were continuing to review video footage and information provided by witnesses to piece together the movements of those involved on the night.

Det Ch Insp Elizabeth Pirie, senior investigating officer, said: "I want to thank everyone who has already come forward to speak about what they saw on the night, or share with us any footage they have.

"Our team are working incredibly hard to understand what happened and identify anyone who may have been involved.

"We now have arrested three boys, but we still want to hear from you if you have any information which could assist us. However small it may seem to you, it may be key to our enquiries."

The force said throughout the coming week, local officers from the Neighbourhood Policing Team are visiting local schools and colleges to offer further advice and reassurance, as well as to support those directly and indirectly affected by this incident.

Ch Insp Rachel Noble, district commander for Eastleigh, said: "The violence witnessed on Saturday night will have undoubtedly been extremely distressing and concerning for everyone who was at the party.

"It is really important to us that everyone knows what support is available for them, should they want to talk about, and how they can report anything to us so the investigation team can continue with their enquiries.

"Local officers will also continue to be out in the area of Park Road, so if you do have any concerns or need to speak about anything then do not hesitate to do so when you see them."