Three men and a young woman have been hospitalised following a serious incident in Co Antrim.
Officers were called to the scene in the Cairn Walk area of Crumlin in early hours of this morning.
The area has since been sealed off while forensic examinations take place.
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Detective Chief Inspector Peter McKenna said: "Police responded to the report of a serious incident at an address in the Cairn Walk area of Crumlin at 2:50am today, Saturday 27th April.
"Three men aged in their twenties and a female teenager were taken hospital for treatment.
"There are no further details at this time."
John McPoland from the NI Ambulance Service said they were called to the scene following reports of a stabbing incident.
He told Belfast Live: "We receive a call at 2.54am following reports of a stabbing incident in the Cairn Walk area of Crumlin.
"We dispatched three crews to the scene as well as a rapid response paramedic and another ambulance officer.
"All three crews took patients to Antrim Area Hospital for treatment."
Sinn Fein Councillor Anne Marie Logue said the quiet residential area is in shock following the incident.
She told Belfast Live: "There's a great sense of shock in the area that this has happened on our doorstep and that four people have been taken to hospital.
"It's been reported as a serious incident which is every worrying especially given the fact we now have forensics at a crime scene in Crumlin, people are just very worried and shocked. At this time the thoughts of the community are with the family members of those who are injured."
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