This was said by Adviser to the Head of the Security Service of Ukraine Yurii Tandit, Censor.NET informs citing Lіga.
"We discuss several options. We are talking about the two-for-two formula. We're talking about the 25-for-50 formula as part of the Minsk agreements," Tandit said.
Asked whether there was UN member Yurii Suprun in the list, Tandit said: "I can say that a lot of statements were made regarding Suprun and we can provide support within the current legislation. The representatives of the UN and the OSCE mission are actively tackling the issue of Yurii Suprun's liberation. He is beyond the list."
Tandit also refrained to comment on the possibility of exchange of religious scholar Ihor Kozlovskyi.
"I can give no comments at the moment," he added.
Earlier, militants took an employee of the United Nations Organization hostage in Donetsk on April 8. The terrorists consider Yurii Suprun to be undercover Colonel of the Security Service of Ukraine.
The terrorists of the so-called "DPR" captured religious studies scholar Ihor Kozlovskyi in occupied Donetsk Jan. 26. The reason for the arrest of the scientist, who contributed in the revival of the Ukrainian Cossacks, could be his involvement in the attempt to blow up a statue of Lenin in Donetsk.
Verkhovna Rada Deputy Speaker Iryna Herashchenko said that security issue would be the key point of the Trilateral Contact Group meeting in Minsk on June 15.
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