The Australian Government's launching a review into the nationwide Optus outage affecting millions.

Customers started to report an inability to access both mobile and home internet services around 6am yesterday - with emergency services unable to communicate and trains in Melbourne brought to a halt.

Services are gradually being restored.

Australian correspondent Oliver Peterson says millions of Australians were left 'vulnerable' as a result of the outage.

LISTEN ABOVE

The Australian Government's launching a review into the nationwide Optus outage affecting millions.
Customers started to report an inability to access both mobile and home internet services around 6am yesterday - with emergency services unable to communicate and trains in Melbourne brought to a halt.
Services are gradually being restored.
Australian correspondent Oliver Peterson says millions of Australians were left 'vulnerable' as a result of the outage.
LISTEN ABOVE

With a straight down the middle approach, Heather du Plessis-Allan Drive on Newstalk ZB delivers the very latest news and views to New Zealanders as they wrap up their day.