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"The United States is deeply concerned that a Moscow court may sentence journalist Roman Sushchenko to up to 20 years imprisonment on fabricated charges of espionage. We call on Russia to drop these charges," Charge d'Affaires, a.i. Harry Kamian told the Permanent Council in Vienna on November 23, 2017.

Read alsoRussian court to sentence Ukrainian journalist Sushchenko to 20 years in prison – lawyer"The United States is also following the cases of Mykola Karpiuk and Stanislav Klykh, who were convicted in May 2016 on bogus 'terrorism' charges. We call on Russia to return both men to Ukraine," he said.

"The United States calls on Russia to abide by its international commitments, including its OSCE commitments, and to respect the sovereignty and territorial integrity of Ukraine," the diplomat said.