Long queues are snaking through Australia’s international airports this morning following what the Australian Border Force (ABF) is describing in a statement as an “IT systems outage”.

The Sydney Morning Herald reports SmartGate passport control machines have been down nationwide since 6am.

Problems processing inbound and outbound passengers are causing delays of up to 90 minutes in Sydney, and long queues have also been reported in Melbourne and Brisbane. The problem is affecting all Australian international airports.

Additional ABF staff has been deployed to process passengers and minimise delays. Water is being handed out to those in the queue at Sydney airport.

The ABC reports that the outages have affected Brisbane’s international airport since 6am and quotes an airport spokesperson as saying “delays will be lengthy”.

Perth airport has also experienced IT problems but so far it has not caused delays.

ABF is encouraging passengers to arrive at airports early to allow for additional time for processing.