KYIV, June 6 -- The vehicle carrying Oleh Tyahnybok, leader of the Ukrainian nationalist party Svoboda, was struck by a drone on the front line, leaving him wounded, Ivano-Frankivsk Mayor Ruslan Martsinkiv said Saturday.

"Oleh Tyahnybok was wounded on the front line," Martsinkiv wrote on Telegram. The mayor did not say where the incident occurred, did not describe the nature or severity of Tyahnybok's injuries, and made no statement about his condition beyond confirming the wounding.

The drone struck Tyahnybok's vehicle, according to Martsinkiv's account. No additional details about the type of drone, the location along the contact line, or the circumstances of Tyahnybok's presence there were provided. Ukrainian authorities had not issu...