Australia helicopter collision: Mid-air clash wreckage covers Gold Coast

Four people have died after two helicopters collided mid-air near Seaworld on Australia's Gold Coast.

Footage shows the aftermath of the clash, with wreckage strewn across the area.

One eyewitness has said he heard "a loud bang" and saw "pieces of shrapnel flying everywhere".

Gary Worrell of Queensland police told reporters that one helicopter appeared to be taking off as the other one was landing.