Police are appealing for witnesses after a spate of arson attacks in Knottingley last night (Wednesday).
Firefighters were called to KMR Skip Hire, on England Lane, after three lorries were ignited at around 8.30pm.
There were two further vehicle fires on Racca Green just before midnight - one involving a van and one involving a car.
Insp Richard Sullivan, of the Pontefract and Knottingley neighbourhood policing team (NPT), said: “Enquiries are ongoing and we are not sure whether they are linked.
“I would urge any witnesses or anyone with any information to get in touch with us.”
Anyone with any information should contact the NPT on 101 or call Crimestoppers anonymously on 0800 555111.