REUTERS

“I am following the reports on Nadiya Savchenko’s state of health with great concern,” Erler said.

“Rule-of-law principles are not being upheld in the trial against her. As a member of the Council of Europe and the OSCE, Russia must adhere to its human rights commitments and is responsible for the health and well‑being of those imprisoned in Russia,” reads the statement.

“I call on those responsible in Russia to release Nadiya Savchenko with immediate effect,” said the German official.

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“Ms Savchenko’s release would also be a positive sign for the relations between Russia and Ukraine. We urgently need this sign with regard to a political settlement to the conflict in and around Ukraine and the implementation of the Minsk agreements,” the statement reads.

Read also'Enough is enough:' U.S. Senator calls on Russia to release Nadia SavchenkoAs UNIAN reported earlier, the trial of Ukrainian pilot, MP and member of the Ukrainian delegation to PACE Nadia Savchenko in a Russian-based Donetsk city court in Rostov region has ended on Wednesday, March 9, and the verdict is said to be announced on March 21-22, 2016.

UNIAN memo. Nadia Savchenko was abducted by Russia-backed militants in Donbas last summer, and then illegally transferred to Russia, where she was charged with complicity in the death of Russian journalists. However, the defense claims she couldn't have been involved in this crime as she had been captured before the journalists were killed.

Read alsoSavchenko defiant: Ukrainian pilot shows explicit hand gesture to Russian judgesSavchenko is being accused of murder and also of attempted murder, according to the PGO statement. The Investigative Committee of the Russian Federation also accused Savchenko of illegal border crossing.

On December 17, a Russian-based Donetsk city court in southern Russia's Rostov region extended the arrest of Savchenko until April 16, 2016.

Russia's prosecutor has called for a 23-year prison term for Savchenko as well as a fine of RUB 100,000 ($1,400).