British police said Monday that at least 11 people were killed in the Shoreham airshow crash disaster and the final death toll could reach 20 as workers continued to inspect the devastation surrounding the accident site, reported Telegraph.

"To give people a sense of scale and also the number of people we are trying to work with in terms of the movements of their loved ones, then I would be really surprised if it would be more than 20," Sussex Police assistant chief constable Steve Barry said, according to Standard.

A vintage Hawker Hunter aircraft crashed over busy A27 highway on Saturday while performing at an airshow at Shoreham Airport, HNGN reported previously. Eleven people were killed in the crash.

"Hopefully the aircraft will be moved today. What that will uncover in terms of further recovery work is unknown and it's possible that once the aircraft is moved that we will discover more fatalities," said Barry, according to RTE.

"Once the aircraft is moved then the forensic examination of the scene continues and even then, once that's clear, the highway will need major repairs, so it could be days rather than hours before the A27 is opened," he added.

Britain's Civil Aviation Authority, following the Hawker Hunter crash disaster, imposed a new restriction on vintage jet at airshows.

"The flying displays by vintage aircraft will be significantly restricted until further notice. Such displays will be limited to flybys and high energy maneuvers are banned - with immediate effect," the aviation authority said in its restriction order, according to DW.

Watch the terrifying video of the crash below