SAN FRANCISCO, California (AP) — British Olympic gold medallist Andrew ‘Bart’ Simpson died when the Swedish catamaran training for the America’s Cup capsised in San Francisco Bay on Thursday.

Artemis Racing said Simpson, their strategist, died after the boat’s platform trapped him underwater for about 10 minutes around 1:00 pm local time.

Artemis said doctors “afloat” with the team and on shore couldn’t revive Simpson after he was freed from the wreckage.

“The entire Artemis team is devastated by what happened,” CEO Paul Canyard said in a statement on the team’s website. “Our heartfelt condolences are with Andrew’s wife and family.”

The 36-year-old Simpson and his partner Iain Percy won the Olympic Star class in 2008 and the silver medal at last year’s London Games. He also won the world title in 2010.

Percy is Artemis’ director and the boat’s tactician. Artemis announced on February 23 that Simpson was joining the team to “provide weather and tactics support” to the crew.

Officials said winds were blowing between 15 and 20 knots when the boat capsised. The Artemis boat flipped in winds of about 20 knots near Treasure Island, which is bisected by the Oakland-San Francisco Bay Bridge. The armada of rescue boats and helicopters were visible from the bridge.

Simpson and an unidentified injured sailor were brought to shore at the St Francis Yacht Club in San Francisco, where paramedics performed CPR on Simpson. He was pronounced dead a short time later.