British police say a single-seater jet has crashed at an airshow in southern England, causing several casualties.

Police say the aircraft, believed to be a Hawker Hunter fighter jet participating in the Shoreham Airshow near Brighton, came down on a highway where it hit several vehicles as it crashed Saturday afternoon.

Local news reports carried video and photographs of a fireball erupting near trees and huge plumes of thick black smoke rising.

West Sussex Police said there were "several casualties" and that the highway was closed in both directions. The force did not elaborate on the conditions of those injured.

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