‘Unspeakable Tragedy’: Uber CEO’s Mother Killed in Boat Crash, Father Hospitalized

2017 Vanity Fair Oscar Party Hosted By Graydon Carter - Roaming Arrivals
Co-founder of Uber Travis Kalanick attends the 2017 Vanity Fair Oscar Party hosted by Graydon Carter at Wallis Annenberg Center for the Performing Arts on February 26, 2017 in Beverly Hills, California.
Photograph by Mike Coppola—VF17 Getty Images for VF

Uber CEO Travis Kalanick‘s mother was killed and his father was injured in a boating accident Friday in California.

The deadly accident occurred at Pine Flat Lake in Fresno, Calif., after his parents’ boat hit a rock, the Fresno Sheriff Department said in a statement. Kalanick’s mother, Bonnie, was 71.

“Last night Travis and his family suffered an unspeakable tragedy,” Uber said in a statement. “His mother passed away in a devastating boating accident near Fresno and his father is in serious condition. Our thoughts and prayers are with Travis and his family in this heartbreaking time.”

An investigation into the accident is underway, the sheriff’s department said. Officials found the couple on shore, where Kalanick’s mother had already died and his father had “moderate injuries.”

On Mother’s Day two weeks ago, Kalanick shared photos of him and his mother from his childhood on Facebook.

“As time goes on, I appreciate my mom, her infinite love and huge [heart] more and more,” Kalanick wrote.

Uber did not immediately respond to a request for comment from Fortune.

Subscribe to Well Adjusted, our newsletter full of simple strategies to work smarter and live better, from the Fortune Well team. Sign up today.