An elderly woman is fighting for life after two cars smashed into each other at a freeway off ramp, before ploughing into a business in West Perth.

Emergency services rushed to the scene after reports of a collision between a van and Ute at the Mitchell Freeway off ramp, near Hay Street, about 7am on Monday.

The vehicles then left the road and hit an office building on Hay Street.

One of the drivers, a woman aged in her 70s, sustained critical injuries.

A man aged in his 30s was also injured and was treated by paramedics at the scene.

No one from the business was hurt, with employees evacuated before first responders arrived.

Shocking images of the scene shows both vehicles completely mangled, with the ute sandwiched on top of the van.

Part of a bonnet can also be seen completely se

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