A WELL-RESPECTED, senior police officer has been killed after he was hit in the back of the head during an altercation Sydney’s north-west.

Detective Inspector Bryson Anderson, 45, was attacked at a semi-rural property on Scheyville Road, Oakville, just after 2pm on Thursday. A 19-year-old man and a 42-year-old woman were arrested at the scene and taken to Windsor police station, where they were being questioned.

Officers had been called to the property earlier in the afternoon after neighbours complained about arrows being fired into their yard from a crossbow.

The situation escalated to the point where 11 officers had to be called to the home.