WATCH: The mangled wreckage of BHP's runaway train which derailed in Western Australia

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A runaway BHP train filled with iron ore made headlines on Monday morning, when it derailed about 120 kilometres south of Port Hedland in WA.

The driver of the 268-car train had stopped around 80 kilometres earlier to inspect one of the wagons.

But it took off without him, and a team of remote train operators in BHP’s control room were forced to carry out an intentional derailment.

Now, footage has emerged which reveals the scale of the accident:

It was reported that the train was travelling at an average speed of more than 100 km/h on its solo journey.

The incident moved markets, as iron ore spot prices surged following news that BHP had suspended its rail operations in the wake of the crash.

BHP said around 1.5 kilometres of its privately-owned railway was destroyed, and expects it will take around a week to fix.

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