"The custody has been extended until December 28," Domansky said.
On May 15, the Security Service of Ukraine (SBU) broke into the office of the RIA Novosti Ukraine portal in Kiev and detained Vyshinsky on suspicion of supporting the self-proclaimed people's republics of Donetsk and Lugansk, as well as treason. On May 17, the court in Kherson ruled that Vyshinsky should be arrested for 60 days without bail.
The detention of Kirill Vyshinsky has prompted widespread criticism by journalists and rights groups, which said that such moves were unacceptable in a democratic society.
Russian President Vladimir Putin has said that Vyshinsky's arrest was politically motivated, adding that the incident demonstrated an unprecedented and unacceptable policy of Ukrainian authorities targeting journalists who were just doing their jobs.