Stefan Henze was first injured in a crash Friday, according to reports

One of Germany’s Olympic coaches has died days after he was seriously injured in a car crash in Rio, officials announced Monday.

Canoe slalom coach Stefan Henze’s fatal injuries were sustained in a crash Friday morning, German sports officials said in a news release. Henze was surrounded by his family when he died, according to the release.

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“Words can not describe approximately what we feel in the Olympic team after this terrible loss,” Alfons Hörmann, president of the German Olympic Sports Confederation, said in the release, according to a translation.

“The IOC is mourning the loss of a true Olympian,” said IOC President Thomas Bach, according to the Los Angeles Times. “Our sympathy is with the family of Stefan Henze, his friends and all of the German Olympic team.”

“We know that Stefan’s own Olympic thoughts live on in many people,” his family said in a statement, according to the L.A. Times.

Henze, 35, was injured Friday while riding “back to the Olympic Village in a taxi when the car struck a concrete barrier head on,” according to the Independent. A second passenger in the car was also hospitalized with minor injuries but released, according to the BBC.

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It was not immediately clear when Henze died. He was not wearing a seatbelt at the time of his crash, a team spokesman told the Independent.

Henze was an Olympic medalist himself, having earned silver in the canoe slalom doubles at the 2004 Athens Olympics, according to the Independent.

The German Olympic team will gather for a memorial to Henze on Tuesday, according to the news release. The German flag will also fly at half-mast at all Olympic sites.

Germany’s canoe slalom team reacted to Henze’s death in a Monday tweet – writing in German, along with a photo of him, that they were “deeply saddened.”