The Ukrainian government and rebel forces have exchanged dozens of prisoners.
This is part of a ceasefire agreement worked out earlier this month.
The transfer has taken place outside the main rebel stronghold in Donetsk under the watch of international observers.
Yuriy Tandit is a representative for the Ukrainian army.
"There is a process of talks. We meet each others demands and fulfil our promises."
36 Ukrainian servicemen have been released today.
Another 21 soldiers were freed the day before.
Ukrainian forces have handed over 31 rebels detained over the course of the five-month conflict.
Hundreds of prisoners are believed to be held by both sides.
A ceasefire between the separatists and the Ukrainian military took effect a week ago, but has been consistently violated.
