Sydney man charged after parents attacked

A 21-year-old man has been charged with wounding with intent to murder after allegedly stabbing his father and mother in their Sydney home during an ice-fuelled rampage.

Former King's School student David Anderson was arrested at the Oatlands home of his parents after they were attacked at about 4am on Friday.

He had allegedly taken ice before the attack, media reports said.

The 55-year-old father suffered serious stab wounds and the 53-year-old mother had facial injuries.

They were taken to Westmead Hospital, where the man remains in a serious but stable condition and the woman in a stable condition, police say.

Anderson was arrested at the scene and later charged with wounding with intent to murder, two counts of wounding a person with intent to cause grievous bodily harm and using a carriage service to threaten to kill.

He was refused bail to appear at Parramatta Local Court on Saturday.