Maximilian Reinelt, German Olympic rower

ST. MORITZ, Switzerland — Maximilian Reinelt, an Olympic gold medalist rower from Germany who was a longtime member of the country’s successful men’s eights crew, has died. He was 30.

Police in the Swiss canton, or state, of Graubuenden said Mr. Reinelt collapsed while cross-country skiing in St. Moritz over the weekend. The cause of death was not announced.

Mr. Reinelt won Olympic gold at the 2012 London Games and silver four years later in Rio de Janeiro.

The German rowing federation said Mr. Reinelt ended his competitive career after the 2016 Olympics to complete his medical studies and was soon to work as a team doctor with a German under-23 squad.

He also won two world championship gold medals and multiple European titles.