REUTERS

The officials statement is published on the EU spokesperson site.

"Reports on Nadia Savchenko's hunger and thirst strike are extremely worrisome," the statement says.

The European Union continues to call for Nadia Savchenko's immediate release.

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"This would also be in keeping with the package of measures for the implementation of the Minsk Agreements and the commitments therein to release all hostages and illegally detained persons related to the conflict in eastern Ukraine," a noted in the statement.

The European Union has underlined that Russia bears responsibility for the health, well-being and observance of the human rights of all persons it detains.