Man in serious condition after being stabbed repeatedly in Sydney's south-west

A man is in a serious condition after he was repeatedly stabbed at a house in Sydney's south-west this morning.

Police were called to a house on Preston Way in Claymore just after 1.30am and found the man inside with a number of stab wounds.

He was treated by paramedics at the scene before being taken to Liverpool Hospital where he remains in a serious condition.

He is believed to be aged in his 20s.

No arrests have been made and police said detectives at the scene would continue investigating.

Anyone with information should call Crime Stoppers on 1800 333 000.