The whereabouts of four Russian political prisoners — Lilia Chanysheva, Ksenia Fadeyeva, Oleg Orlov and Alexandra Skochilenko — are unknown after their apparent transfer to new prison facilities, lawyers and relatives said on Monday. Prison authorities in Russia often subject high-profile inmates to secret and lengthy transfers across the country. Shortly before his death at an Arctic penal colony in February, the whereabouts of late Kremlin critic Alexei Navalny were unknown for nearly three weeks while he was moved to that prison. The husband of Navalny ally Chanysheva said on Monday that hi…