By Anastasiia Malenko KYIV (Reuters) -When Ukrainian Leniie Umerova crossed into Russia on her way to see her ailing father in their native Crimea in late 2022, she was detained and forced to endure what she calls a "carousel" of charges and prison transfers that lasted nearly two years.

: Russian President Vladimir Putin and Transport Minister Roman Starovoit look out of a helicopter while flying over the site of the Kerch bridge in Crimea, 18 March 2016

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Ukrainian Radio Free Europe/Radio Liberty journalist Vladyslav Yesypenko was released Sunday after more than four years in Russian custody in Crimea, according to RFE/RL.

An electrical substation in Russia was also hit during the overnight attack

There are also unconfirmed reports that the deputy commander of Russia's Black Sea Fleet has been taken out, coming amid reports of Russia's huge losses in Ukraine since the beginning of their invasion in 2022.

Russian official claims full control of Ukraine's Luhansk region as Putin intensifies war efforts despite Trump's ceasefire attempts, with NATO warning of potential future attacks on Europe.