A man is in hospital after he was stabbed at a house in Barry.
Detectives were called to an address on Ramsey Road in the Gibbonsdown area at just after midnight on Sunday morning.
A 33 year-old local man was taken to hospital with stab wounds, which are not believed to be life threatening.
A number of locations around the scene have been cordoned off and investigations are continuing.
There are no further details at the moment.
Anyone who witnessed the attack or may have information should contact South Wales Police on 101 or use the live web chat, quoting reference no. 2400413499.