(QHA) -

Official Washington has expressed deep concern over the Russian court's decision on further detention of Ukrainian MP Nadiya Savchenko and called on the Russian authorities to immediately release her along with all the other Ukrainian hostages.

"The United States is deeply concerned by the decision by a Russian court to continue the detention of Ukrainian Member of Parliament Nadiya Savchenko to May 13. Ms. Savchenko has been on a hunger strike for 75 days to protest being held hostage by Russian authorities. The United States deplores her continued ill-treatment and is deeply concerned by reports of her deteriorating health,"- reads the statement of U.S. State Department.

"By any standard, Russia's detention and treatment of Ms. Savchenko is unacceptable. We call on Russia to honor its commitments under the September 2014 Minsk agreements and the February 15 implementation plan by immediately releasing Nadiya Savchenko and all other Ukrainian hostages," the State Department concluded.

The statement comes a day after the Moscow City Court ruled to leave the Ukrainian pilot in detention.

Savchenko has been forcibly held in Russia after being kidnapped in the Luhansk region in June 2014. She is accused of involvement in the murder of two Russian journalists who died in June 2014 in the course of Russian aggression in the Donbas. During the investigation she was originally arrested until Feb. 13, 2015.

Savchenko denies all charges.