NSW police shot dead a 20-year-old man after he allegedly grabbed an officer's gun

The man allegedly jumped a fence into a nearby backyard and threatened the officers which resulted in a scuffle

A 20-year-old man has been shot dead by NSW police after allegedly grabbing an officer’s gun during a confrontation in Sydney’s west.

Four police officers approached the man in St Marys about 10.30am on Wednesday while they were patrolling the area.