As reported by Censor.NET, this was announced by Ombudsman Valeriia Lutkovska on air of Hromadske.
She is certain that the prisoners can be transferred to mainland Ukraine in a month at most.
"Those people who were imprisoned in Crimea under Ukrainian legislation and upon decisions of Ukrainian courts should be returned to the territory controlled by Ukrainian government. This is needed for them to be able to benefit from the Ukrainian legislation and to be held responsible under Ukrainian laws," Lutkovska said.
According to the Ombudsman, some of the prisoners have the right for the Savchenko law to be applied to them, under which one day in pre-trial detention counts as two days in jail.
Lutkovska said more inquiries into return of prisoners to the mainland Ukraine might be filed.
"If we succeed in the talks about these 18 people, if we manage to transfer them from Crimea to territory controlled by Ukrainian government, this issue will be discussed broader because we will have more inquiries," Lutkovska said.
Earlier, chief of staff of the Ombudsman Bohdan Kryklyvenko informed that 34 prisoners from Russia-occupied Crimea have asked Ombudsman Lutkovska to assist with their transfer to the mainland Ukraine.
Related materials: Occupied territories - Crimea and Donbas