A 10-year-old boy is in a critical condition after he was allegedly assaulted at a school in Sydney’s west.

Emergency services were called to Wattawa Heights Public School in Bankstown just after midday after reports a boy had been injured.

He was taken to The Children’s Hospital at Westmead where he remains in a critical but stable condition.

Details of the alleged assault are not known and police have not made any arrests.

Officers from Bankstown Police Area Command attended and established a crime scene and inquiries are continuing,” NSW Police told 9NEWS in a statement.

(9news)