Olympic surfing hopeful Katherine Diaz was killed by lightning near her El Salvador home at a training session for a qualifying contest.

The 22-year-old athlete was struck at El Tunco beach about an hour south of San Salvador on Friday, and efforts to revive her failed.

Her uncle Beto Diaz, a surfing coach, was with her when it happened.

Diaz said that after his niece arrived at the beach, she hugged a friend, a German surfer who was also there to practice. When they finished embracing, there was roar , he told a local newspaper. The friend was thrown by the force of the lightning strike. The board threw me back. Katherine died instantly, Diaz said.

Observers said the storm had come up suddenly. The sky was clear and it was an unforeseen storm that did not seem to carry much electrical intensity, a witness told a Spanish-language newspaper, The Guardian reported.

Diaz was preparing for the 2021 El Salvador World Surfing Games in May. The contest is a qualifier for the Summer Olympics in Tokyo .

The El Salvador Surf Federation issued a statement grieving a great athlete who has represented our country. See you soon, great warrior. El Salvador is in mourning.

Her brother Jose Diaz, president of the federation, wrote on Instagram: We will always carry you in our hearts. God decided to take you now. We already miss you. Love forever little sister.