Dramatic capsize in America's Cup challenger series

American Magic was chasing its first win in the Prada Cup after three straight losses and rounded the last mark ahead of Luna Rossa.

But a savage gust of wind in a rain squall ahead of impending thunderstorms struck the American yacht which soared into the air, then crashed onto its side.

The crew are all safe and not injured.

American Magic has four days to make repairs before racing resumes on Friday.