Australia's Indian Pacific trains are running again this morning after a derailment in South Australia's outback on Monday forced the track to close.

A freight train derailed on part of the east-west line, damaging about two-kilometres of track.

The wagons were removed yesterday, and the track was cleared and re-opened overnight.

The closure meant Great Southern Rail had to cancel an Indian Pacific train from Perth, and delay a train that was due to leave Adelaide yesterday morning.

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