Knife-wielding man shot dead by police

A knife-wielding man has been shot dead in Sydney's southwest after he allegedly attempted to stab a police officer. Emergency services were called to Bird Walton Avenue in Middleton Grange, about 40km from the CBD, about 11pm on Saturday following reports a man was armed with a knife. Police said the 34-year-old allegedly confronted and threatened officers on arrival, with 33-year-old male officer struck with the knife but protected by his operational vest. A Taser was used but proved ineffective before police shot the man. The police officer was not injured. A critical incident team from the state crime command's homicide squad will investigate the circumstances of the shooting and the probe is subject to an independent review.