Police are investigating reports that a woman in her twenties fell from a motorway bridge over the M20.

The incident happened on Monday evening, during the rush hour.

At around 5.15pm, drivers ground to a halt after seeing the blonde woman lying in the hard shoulder of the London-bound carriageway, near junction 4.

It is believed the woman had fallen from the Lunsford Lane bridge over the motorway.

The woman suffered serious injuries described by ambulance crews as life-threatening.

She was taken by ambulance to a hospital in London. Her condition on Tuesday morning was reported as critical but stable.

The incident caused significant congestion with tailbacks extending to junction 6 at one point.

The road was fully re-opened at around 6:55pm.