A Banksy print is believed to have been stolen from an unauthorised exhibit of the street artist’s work in Canada.

Toronto police, who are investigating the apparent robbery, said the print was taken out of the exhibit in the city’s west end on Sunday.

Police learnt the piece had gone missing after they responded to a call over an alleged break-in at the site of the exhibition.

They say the stolen print was called Trolley Hunter and valued at $35,000 (£26,000). It shows three crouching hunters – with one pointing a spear at a clustering of shopping carts.

Police have released a video appearing to show the theft while the exhibition was still being set up.

The footage shows a man enter the empty gallery in an industrial building via an interior door shortly after 5am on Sunday. He goes through two large galleries which are in the middle of being set up before arriving at a wall hung with several framed prints.

Inside Banksy's Dismaland Show all 13 1 /13 Inside Banksy's Dismaland Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park "Seagull Attack" by Banksy sits near the entrance, proved to be a bit of a photo opportunity, a taxidermied seagull perches on the other side of the bench Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park The Bill Barminski - Cardboard security entrance, visitors must first get through security to enter the park. This can include being searched, emptying bags and even being instructed to touch your toes. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park Dismaland opened to the general public this weekend and everyone seems to be talking about it. Many have speculated whether long queues and website crashing issues are purposeful in order to make Dismaland that little bit more dismal. Reuters Inside Banksy's Dismaland Dismaland19.jpg The Bill Barminski - Cardboard security entrance, visitors must first get through security to enter the park. This can include being searched, emptying bags and even being instructed to touch your toes. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park Visitors are handed their very own guide to the park inside, featuring the names of the installations and show-times. On the front it brands Dismaland "the UK's most disappointing visitor attraction". Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park An overview of the park, set on the former site of Tropicana. Tropicana was closed in the 1990's and since then has had rumours of regeneration. The exhibition will be the first major event on site since its heyday as a seaside attraction. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park "Topple the anvil and win the anvil" - just one of the many disappointing games visitors can try their hand at. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park "What its really like to be a princess" the scene of Cinderella hanging lifeless outside her pumpkin carriage as paparazzi surround it inside the castle in the center of the park. A dark reference to the death of Princess Diana. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park Mushroom Cloud made of Cotton by Artist Dietrich Wegner Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park A twist on theme park boating games the white cliffs of dover provide a backdrop to boats of migrants and faceless bodies float in the black water. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park "Killer Whale jumping from a toilet" a piece by Banksy as a reference to the treatment of orca's in seaworld parks. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park In classic Banksy style he applies his stencilling technique to a mural named "woman showering" when talking about the exhibition Banksy declared that he was aiming for something very different to street art. Reuters Inside Banksy's Dismaland A Look Inside Dismaland Bemusement Park Another piece by banksy looms above a lake referencing Jeffrey Archer Reuters

He then picks one up, holding it away from his body, and proceeds to walk through the two galleries and out the door where he came in.

Police say the suspect was wearing glasses, a green camouflage baseball hat, black jacket, blue jeans rolled at the cuff, and grey running shoes.

“We can confirm a piece of art went missing during setup of The Art of Banksy exhibition in Toronto. The incident was reported to the police who are currently investigating the disappearance,” Corey Ross, president of Starvox Exhibits, said.

“Due to the investigation, we will not be commenting further at this time.”

The exhibition is said to comprise of some $35m of the anonymous British street artist’s work.

A screenprint titled 'Trolley Hunters' by artist Banksy in Selfridges in London on 22 May 2008 (Rex) (Rex Images)

But Banksy has publicly disowned both the show and its curator, Steve Lazarides, who is his former agent and worked with him for about a decade.

The Bristol artist’s work has long been subject to robberies but it is more common for theft to be carried out on his public works rather than in private exhibitions. In 2004, a giant satire of Rodin’s The Thinker was stolen in the middle of the day in central London.