Tymoshenko was jailed in 2011 for abuse of office over a gas deal with Russia but her supporters and Western leaders regarded her as a political prisoner.
Kiev parliament sets early election for May 25, Opposition leader Tymoshenko freed from prison.
The agency said in a note that the downgrade reflects our view that political situation in Ukraine has deteriorated substantially.
Meanwhile,US voiced ‘disgust’ at the Ukraine authorities for crackdown on protestors.
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