Kiev recently proposed a peace plan for the Donetsk region, where government troops are fighting pro-Russian separatists.
It included more political and economic autonomy as well as protection of the Russian language.
But separatists say this is not enough, and have called for more Ukrainian and Russian volunteers to join their cause.
Al Jazeera's Nazanine Moshiri reports from Donetsk.
Source: Al Jazeera