Commonwealth Bank’s ATM network has crashed across Australia. Its EFTPOS card payments system has also gone down, meaning Commbank customers will have to use cash for retail and other transactions.

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The system collapse was reported in the early hours of this morning, when a flurry of complaints hit CBA’s Twitter account.

“We’re still working to resolve this but you can access and transact using NetBank, phone banking and in branch,” CBA replied to one customer who complained via Twitter 13 minutes ago.

However, customers can view and transact on NetBank accounts in branch or via phone banking, the bank also confirmed.

No word yet on what caused the system failure.

CBA said it was working on resolving this as a “matter of priority.”