North Yorkshire Police have issued an appeal after a green quad bike which had been reported stolen was involved in a crash on Tuesday teatime.
Officers say the serious collision was between a red curtain-sided light goods vehicle and the quad bike at around 5.25pm on Tuesday 21st September on B6265 Grassington Road, not far from the junction with the Skipton bypass.
The lorry was travelling towards Skipton and the quad bike was heading in the opposite direction, having come from Gargrave Road and along the A65/A59 bypass.
Two males on the quad bike, who are aged in their late teens and from the Bradford area, sustained serious injuries. They are receiving treatment in hospital.
The road had to be closed while forensic collision investigation work was undertaken.
North Yorkshire Police has referred the collision to the Independent Office for Police Conduct (IOPC) due to the presence of a police vehicle at the time of the incident, which is standard procedure under such circumstances.
If you witnessed the collision or saw any of the vehicles prior to the incident - or have any dash-cam footage - then please contact North Yorkshire Police on 101, select option 1, and speak to the Force Control Room quoting reference number 12210206442.
Information can also be passed on anonymously to Crimestoppers on freephone 0800 555111 or via crimestoppers-uk.org