Tiger Woods is mourning a significant loss in the family. The golf legend announced on social media that his mother, Kultida Woods, died early on Tuesday. She was 78. Woods, who has yet to play on the PGA Tour this season, made the announcement with “heartfelt sadness.” No cause of death was announced.

Kultida Woods, the Thai-born mother of Tiger Woods, died Tuesday morning, a week after being seen attending his indoor TMRW Golf League in Florida. Woods did not reveal how his 78-year-old mother died in his social media post announcing her death.

Tiger Woods took to social media to announce that his mother, Kultida Woods, had died and to share a heartfelt tribute.