A teenage girl is in a serious condition in hospital after being stabbed at a party which is believed to have got out of control.
The 16-year-old was taken to Ipswich Hospital on Saturday night after officers were called to the incident in Bilberry Road in the town.
Residents said there had been a party organised by a teenager whose parents were out of the house.
Today Alison Greene, who lives with her teenage daughter at the house on a modern estate on the outskirts of Ipswich, said about a dozen young people had attended the gathering.
She did not want to speak about the incident but described the party as "a small gathering".
She added: "From what we hear she's is in a bad way and our thoughts are with the family."
A neighbour said: "We heard a bit of noise coming from the house and we saw the police arrive."
The girl was taken to hospital in a critical condition, suffering neck injuries, but is now said to be stable.
A spokesman for Suffolk Police said officers were called at 10pm to reports of a stabbing incident.
An 18-year-old man, who is thought to have known the girl, was arrested on suspicion of causing grievous bodily harm and taken to the Ipswich Police Investigation Centre.
He has been released on bail until December 19.
An ambulance service spokeswoman said crews gave life-saving treatment to the girl.
The spokeswoman said: "Our crews arrived within minutes and found her semi-conscious.
"They carried out excellent work, treating her on scene for a neck wound, clearing her airway to enable her to breathe properly and closing the wound."
The girl was named locally as Sayshana Mason.