Russian court upholds 21-year sentence for alleged SBU agent accused of hiding UAV caches in Nizhny Novgorod region

A Telegram post claims a Russian court upheld a 21-year prison sentence for a man accused of preparing hidden caches with UAVs for terrorist attacks in Russia's Nizhny Novgorod region on instructions from Ukraine's SBU. The post does not specify any actual drone attack occurring, only alleged preparation and storage.