Poland arrested a former ally of the late Russian dissenter Alexei Navalny and exiled Kremlin critic Mikhail Khodorkovsky on charges of threatening public safety, Polish mediareported Wednesday, citing local authorities.Igor Rogov was detained on July 29 in the southern Polish city of Katowice where he was studying on a scholarship, reported Vot Tak, a Russian-language affiliate of the Polish broadcaster Belsat, citing the Polish prosecutors office spokesman.Rogov, 29,faces up to 10 years in prison if found guilty of endangering public safety with the use of an explosive and up to eight years in prison if convicted of creating an immediate threat of public endangerment.Polish authorities have not publicly commented on Rogovs arrest and more details of his case were not immediately available.Rogov will be held in pre-trial detention for three months, Vot Tak reported.In 2017, the activist served as a senior leader of Navalnys local political headquarters and, later, Khodorkovskysnow-disbanded Open Russia opposition movement in the republic of Mordovia, a region in Russias Volga Federal District.Poland, a European Union and NATO member, has been one of Ukraines staunchest allies since Russias February 2022 full-scale invasion.The Central Europen country hosts a small population of Russian exiles.