A Hawker Hunter plane has crashed into several vehicles after coming down at Shoreham Airshow in West Sussex.
Sussex Police said there are several casualties, but could not give details on their condition.
The plane crashed into vehicles on the nearby A27. The road is likely to remain closed for several hours.
Eyewitness Stephen Jones said the plane was performing a loop but did not complete the manoeuvre and crashed. Police said it ended up in a bush.
He said: "The aeroplane involved is a Hawker Hunter T mark 7. And he'd just begun his flying display.
"He'd gone up into a loop and as he was coming out of the loop I just thought, you're too low, you're too low, pull up.
"And he flew straight into the ground either on or very close to the A27, which runs past the airport."
http://www.bbc.co.uk/news/uk-34027260