A 24-year-old man is in a serious but stable condition after a triple stabbing last night.
The man was stabbed in the back and torso during an attack by three men.
The men are believed to have broken into a property in Snowden Court, Lansbury Park, Caerphilly and attacked those inside.
A 23-year-old man was stabbed in the back and arm and a woman of the same age was stabbed in the arm.
They were all taken to the University of Wales Hospital Cardiff, where the 24-year-old man remains.
The two other victims have been discharged.
Neighbours said the victims were from the same family and the attack happened between 8.30pm and 9pm last night.
Gwent Police said they were called to the home at 9pm and believe the suspects fled in a dark car with tinted windows.
Anyone with any information about the incident is asked to ring 101 or Crimestoppers anonymously on 0800 555 111 quoting log 453 30/04/14.