Ukrainian drones struck four Russian fighter jets on April 25, including two Su-57s, an Su-34, and another aircraft whose model was not specified, at the Shagol airfield in Chelyabinsk, Russia, Unmanned Systems Forces commander Robert “Magyar” Brovdi confirmed on May 1.

https://kyivindependent.com/ukraine-strikes-russian-airfield-damaging-2-fighter-jets/ (article was updated after posting, ignore the number in the URL)