A knife-wielding man has been shot dead by police, triggering a critical incident investigation.
Officers were called to a unit complex at Glebe in Sydney's inner west just before midnight over concerns for a man's welfare.
When police arrived they were confronted by a 43-year-old man armed with a knife.
One officer discharged a Taser before another officer shot the man who was treated by paramedics but died at the scene.
The unit block where the incident took place is part of a social housing estate.
The government last month scrapped plans to redevelop the block and include private housing.
At the time, it was said the redevelopment plan was causing unnecessary stress for tenants.
Detectives and forensic investigators could be seen scouring the site for information on Thursday morning.
A critical incident team from the State Crime Command will investigate the death and an independent inquiry will also be launched.