Five teenagers have been seriously injured after they were stabbed at a party on Halloween - as police ask for information about an "unknown group".
Hampshire Police were called following reports of the incident in Chandler's Ford just after 10.30pm on Saturday at a property in Park Road.
All five of the boys, three aged 16 and two aged 17, were taken to hospital having suffered serious injuries.
Officers established that an "unknown group" had gained entry to the party.
An investigation was launched into the incident, as police overnight spoke to witnesses, identified CCTV and other footage, and made enquiries at neighbouring houses and in a number of other nearby streets.
Officers' enquiries have continued during the day, with "scenes in place" in Park Road and Valley Road, said Hampshire Police.
Detectives say they want to hear from anyone who could provide information to support the investigation.
That includes anyone who attended the party or has footage, including doorbell camera footage covering Park Road and the surrounding area.
Detective Chief Inspector Elizabeth Pirie said: "We are already hard at work identifying anyone who was at the party who may be able to assist our enquiries, whether that be having directly witnessed what took place, having filmed any footage which may be relevant, or who may be able to help us identify the unknown group.
"I understand the response the local community may have to hearing about this incident this morning, and I do not underestimate the impact our scenes will be having on those living in the area.
"These scenes are vitally important for our enquiries and we are grateful to the understanding of our communities whilst we work to establish the facts.
"If you do have any concerns or information, then please do not hesitate to speak to us."
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DCI Pirie added: "We particularly want to hear from anyone who can provide information to support our investigation.
"If you were at the party and have not spoken with officers yet, or you have any CCTV, mobile phone, dash cam or doorbell camera footage covering Park Road and the surrounding area, then please get in touch.
"Any information, however small it may seem, could help our enquiries."
The MP for Eastleigh, Liz Jarvis, said on X on Sunday: "My thoughts are with the victims and their families and all those affected by the incident in Chandler's Ford last night, and my thanks go to our local police and emergency services for their prompt response.
"It's important not to speculate or share unverified information."
Anyone with information should contact police on 101 or via their website, or Crimestoppers anonymously.
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