Police are asking motorists in the Stroud area to drive with caution following a report of a fuel spillage spanning from junction 13 of the M5 through to Tetbury.
Officers from the Roads Policing Unit believe that the diesel is leaking from a fuel tanker and enquiries are ongoing to locate and inform the driver.
Anyone who has travelled through the area and seen the tanker or has dashcam footage of it is asked to call 101 quoting incident 106 of 31 October. Please dial 999 if you are driving behind or can see the tanker at the time.
Officers are liaising with colleagues from National Highways and a number of road closures are being put into place so that the fuel can be cleared.
Areas that have particularly been affected include the A46 Bath Road in Nailsworth, outside Renishaw on Latimer Road in Stonehouse and Old Bristol Road in Nailsworth.
Motorists are asked to avoid those areas for the time being.