SAN FRANCISCO — The mother of Travis Kalanick, the chief executive of Uber, was killed and his father seriously injured in a boating accident on Friday near Fresno, Calif., the company said on Saturday.

Bonnie Kalanick, 71, who formerly worked in advertising sales at The Los Angeles Daily News, had long had a close relationship with her son Travis, whom she raised with her husband, Donald, in the suburbs of Los Angeles.

Donald Kalanick was rushed to a nearby hospital and was listed in serious condition, the company said. By midafternoon Saturday, an Uber spokesman said his condition had stabilized.

“Travis and his family suffered an unspeakable tragedy,” the spokesman, Matt Kallman, said in a statement. “Our thoughts and prayers are with Travis and his family in this heartbreaking time.”