Cybersecurity breach at NSW Health declared 'major incident' - ABC News & Headlines – Australian Broadcasting Corporation

The cyber breach has been declared a major incident. (ABC News: Liam Patrick)

There has been a cybersecurity data breach at NSW Health.

Police are investigating the "major incident", with Cyber Security NSW saying no patient data has been compromised.

It was expected NSW Police, NSW Health and Cyber Security NSW would address the media later today.

Police are investigating a major cybersecurity breach at NSW Health, but officials have reassured the public that patient data has not been compromised.

About 1pm on Friday, the State Crime Command's Cybercrime Squad was alerted to a suspected data breach at NSW Health.

Cyber Security NSW, which leads the state government's response to significant cyber incidents and cyber crises, said the breach had affected an isolated server.

"The breach has been declared a major incident," a spokesperson said.

NSW Health directed media inquiries to NSW Police.

NSW Police are investigating the incident. (ABC News: Floss Adams)

In a statement, NSW Police said cybercrime squad detectives were leading the investigation under Strike Force Civic and were working closely with NSW Health and Cyber Security NSW.

Health Minister Ryan Park said he was first made aware of the cyber breach in "the last couple of days".

He said he was unaware of who was behind the suspected attack.

"Police made it clear that given it is a live investigation, they wanted to determine when that [news] goes public," he said.

Ryan Park addressed the media on Wednesday. (ABC News: Justin Huntsdale)

Mr Park reiterated that at this stage no patient data had been impacted, nor was there a clinical risk or service that had been compromised.

"We have very robust cybersecurity systems in place."

Transport Minister John Graham told 702 ABC Sydney the incident was a "big reminder about the importance of cybersecurity".

"It is getting more difficult, there's no question about that," he said.

"Whether you're in government or in a private company or just as a citizen, it is an increasingly difficult area."

Mr Park shared Mr Graham's sentiment that it was increasingly important for government agencies to strengthen their systems to combat criminal activity and threats.

It was expected NSW Police, NSW Health and Cyber Security NSW would address the media on the issue later today.