Two armed men were caught on CCTV smashing up vehicles before setting them on fire in a reckless attack.
In the video, the two men, dressed in dark clothing make their way over to a number of parked HGVs, smash the windows before setting them on fire.
The incident occurred at the West Pimbo Industrial Estate on Tuesday, February 2 at around 8:20pm.
Each vehicle is worth £80,000 and suffered substantial damage by the two offenders who were seen on CCTV entering the yard.
Detectives are appealing for information following the arson attack in Skelmersdale.
Keep up to date with the rollout of the coronavirus vaccine in your area by using your postcode below
DC Kate Molloy of Lancashire Police said: “We have launched an arson investigation following an attack on high value HGVs at a unit in Skelmersdale.
“Two offenders dressed in dark clothing have entered the site with incendiary devices, smashed the window of the HGVs and set alight three vehicles. They have then made off on foot towards Pimbo Road.

“We are appealing for any witnesses or drivers with dash cam footage who were on West Pimbo between 8pm and 8.30pm on that day to check their footage.
“Likewise, if you saw anyone acting suspiciously in the area, or someone in your household returned home that night smelling of smoke, please come forward.”
It follows a previous incident at the site on Sunday, January 10 where another vehicle was reported to have been set on fire, again causing substantial damage.
DC Kate Molloy added: ”It is the second such incident in a number of weeks and we are keen to identify those responsible.
“Anyone with information can contact police on 01695 566113 quoting log reference 1348 of February 2nd.
“Alternatively, independent charity Crimestoppers can be contacted anonymously on 0800 555111 or online at crimestoppers-uk.org.”