A One Nation campaign truck has been set on fire outside a Hobart shopping centre, with party leader Pauline Hanson blaming the ‘left’ for the blaze.

Tasmania Police is investigating the suspicious fire, reported on Sunday night at Howrah.

One Nation Senate candidate Adam Lambert had been driving the truck, emblazoned with the faces of Pauline Hanson and her team. He was inside a shop buying groceries when the fire started.

Our One Nation truck in Tasmania was parked outside a shop while our candidate was buying groceries. Someone was seen torching it before fleeing.

It is amazing how the left call for tolerance but act like they’re above the law when you don’t agree with their ideologies. -PH pic.twitter.com/8WHAyasgcc

— Pauline Hanson 🇦🇺 (@PaulineHansonOz) May 19, 2019

“Someone was seen torching it before fleeing,” Senator Hanson wrote on social media.

“It is amazing how the left call for tolerance but act like they’re above the law when you don’t agree with their ideologies.”

Mr Lambert posted a video on Facebook saying he walked out of the shop to discover the fire.

“If you don’t like us, don’t vote for us, but for those magnificent supporters who have voted for us, this is a little more encouragement on how we have to work a bit harder for you guys next time,” he said.

Police are urging anyone with information to come forward.