Olympic sailor Andrew Simpson has died while training to compete in this year's America's Cup.

The gold medallist drowned in San Francisco Bay, off the coast of California, after his catamaran capsized on Thursday (09May13).

San Francisco Fire Department officials have confirmed the Brit is dead and a teammate was left with serious injuries.

Both men were brought ashore and taken to the St. Francis Yacht Club, where paramedics performed Cpr on Simpson. He was pronounced dead a short time later.

It is not clear what caused the Artemis Racing catamaran to capsize.

The 34th annual America's Cup begins in September (13).