A fire has destroyed all cars in a 1,600-capacity multi-storey car park next to the Echo Arena in Liverpool.
The Liverpool International Horse Show was cancelled as firefighters tackled the huge blaze next to the venue on Liverpool's waterfront.
Merseyside Police said: "Initial investigations indicate that an accidental fire within a vehicle caused other cars to ignite.
"We believe that all vehicles parked in the car park have been destroyed and advise owners to contact their insurance companies."
No-one has been seriously injured, the force said.
According to Liverpool's mayor Joe Anderson the blaze started in a Land Rover on the third level of the car park.
Horses that had been on the first level were moved to the arena, he added.
Crews were first called at 4.42pm and were on scene eight minutes later.
The area was evacuated along with some apartments nearby due to smoke billowing from the blaze.
Police advised members of the public to stay away from the area and traffic restrictions were put in place.
A spokeswoman for the Echo Arena said: "We regret to announce that the Liverpool International Horse Show has been cancelled tonight due to a serious fire in the multi-storey car park on site.
"All people and horses are safe and secure."
The four-day event was due to finish with Sunday evening's show where around 4,000 people were expected.
There were periodic explosions and flames shooting up the outside of the building as the cars burned.
