A man is in a critical condition in hospital after a stabbing at a house in County Antrim.
Three other people were taken to hospital after the incident in Crumlin. Two of them - men in their 20s - are still receiving treatment.
Three men have been arrested.
Police said they responded to a "report of a serious incident at an address in the Cairn Walk area" at 02:50 BST on Saturday.
"Three men aged in their 20s and a female teenager were taken hospital for treatment," said Det Ch Insp Peter McKenna.
The NI Ambulance Service said it was called to reports of a stabbing.
Three crews took patients to Antrim Area Hospital.
A woman who lives nearby said she went outside after hearing noise coming from a neighbour's house shortly before 3am.
She said she saw a young woman standing at the front door of a house in Cairn Walk on the phone asking for help.
"I went round when I heard all the shouting, then I came round and she was screaming down the phone."
"She was just standing there screaming down the phone 'somebody help me, somebody help me," the neighbour said.
The woman said she returned home to call the police but by then they had already arrived.