Australian banks and other businesses including Virgin Australia have been hit by a major telecommunications outage.
Westpac Bank, the Commonwealth Bank, St George Bank and the Reserve Bank of Australia were among those affected.
ANZ was also offline for about half an hour but has told AAP its services are now available after it worked around the problem.
About 45 minutes after the Commonwealth Bank tweeted an apology to customers it said services were coming back.
"We are starting to see services return to normal following a tech outage that had widespread impact across businesses. Thank you for your patience," it tweeted about 4.15pm.
Customers reported being unable to access services online and through apps.
It's understood the issues relate to a provider of digital services to some of the world's biggest companies.
Downdetector, which tracks outage information in real time, at one point listed almost 50 entities experiencing problems, including the federal government's MyGov platform.
AAP has sought comment from the government.
Virgin Australia said it was experiencing a system outage affecting its website and guest contact centre.
