Ukraine’s security chief has been fired for alleged “treason”.
President Volodymyr Zelenskyy also fired Attorney General Iryna Venediktova amid allegations that dozens of employees in her office “worked against our state”.
Zelenskyy said: “Such a series of crimes against the foundations of the state’s national security, and the links established between Ukrainian security forces and Russian special services, raise very serious questions about their respective leaders.”
Ivan Bakanov, the head of the security service of Ukraine (known as the SBU), was an old friend of Mr Zelenskyy, according to Ukrainian news agencies.
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The news comes as former Russian President Dmitry Medvedev warned that any outside attack on Crimea would lead to a “Judgment Day”.
Russia annexed the Black Sea peninsula of Crimea from Ukraine in 2014.
Moscow also backed pro-Russian armed separatists in the Donbas region of eastern Ukraine at the time.
According to the Russian news agency TASS, in the event of an attack on Crimea, Mr Medvedev said: “The doomsday will come very quickly and hard. It will be very difficult to hide.”
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Medvedev’s statement was issued a day after a Ukrainian official suggested that Crimea, which most of the world still considers part of Ukraine, could be a target for US-made HIMARS missiles recently launched by Kiev. have been deployed.
Medvedev has previously warned the US of the dangers of attempting to punish a nuclear power like Russia for its actions in Ukraine, saying it “could endanger humanity”.
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On the front lines, Russian missiles continued to hit industrial facilities in the southern Ukrainian city of Mykolaiv on Sunday, Mayor Oleksandr Senkevych said.
Mykolaiv has faced frequent attacks in recent weeks as the Russians have tried to soften the Ukrainian defenses.
The Russian army has set itself the goal of closing off the entire Black Sea coast of Ukraine all the way to the Romanian border.
If successful, such an attempt would deal a crushing blow to Ukraine’s economy and trade, and allow Moscow to secure a land bridge to Moldova’s separatist region of Transnistria, which is home to a Russian military base.