MOSCOW — The office of Uzbekistan’s prosecutor general confirmed Friday that Gulnara I. Karimova, the once-powerful daughter of the man who led Uzbekistan for more than two decades, was in state custody.

Ms. Karimova disappeared from public view in 2014, and was convicted the next year of extortion and embezzlement charges, but until Friday’s announcement the Uzbek authorities had not commented on her status. The prosecutors said that Ms. Karimova was currently in custody, and that she was facing additional criminal charges. They did not specify the location or conditions of her detention.

Ms. Karimova, 45, was once one of the most influential public figures in Uzbekistan, second only to her father, Islam Karimov, the authoritarian leader of the Central Asian country from 1989, when it was still a Soviet republic, until his death last year.