Oklahoma City Thunder guard Josh Giddey is under investigation by the NBA after facing accusations of an inappropriate relationship with an underage girl, a league spokesperson said Friday.

The investigation was sparked by a social media post that said a girl who appears in photos and videos with the Australian basketball player was a high school junior, The Associated Press reported. The social media user who made the post was anonymous, and their account has since been deactivated.

NBA spokesperson Mike Bass said that an investigation is underway.

Questioned by the press Friday, Giddey declined to comment.

“I understand the question, obviously, but no, there’s no further comment right now,” said Giddey, age 21.

Thunder coach Mark Daigneault dismissed an inquiry about whether the situation would be a distraction for the team.

“Personal matter, and I have no comment on it,” he said. “And that will be my comment on anything related.”