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"Officially, at this moment we can trace 57 people, we know where they are," he said.

At the same time, 131 people are considered to be in the militant captivity.

Read alsoUkrainian soldier exchanged for Russian Major Starkov"We really want them to come back soon, especially before the holidays. And we can take them away at any time. It's not a problem for us to get to the point near Donetsk, in the suburbs, and to take away all the guys. The main thing is that the Kremlin, as member of the Minsk agreements, be determined and keep its word," Tandyt said.

Earlier, the Tripartite Liaison Group urged the parties to complete the exchange of prisoners before the end of 2015. First of all, it concerns the release of the most vulnerable captives.