The separatist leader in Donetsk province said the Ukrainian army "closed" the city of Lyman, where the Russian forces were controlled.
There are ominous news about Krasny Liman.
Our troops are fighting, we are bringing the reserve force to and must hold back, but the enemy launched a formidable force.
Russia and Ukraine have not commented on the information of DPR leaders.
Krasny Liman is the way Russia and the separatist call the Lyrics City of Donetsk, eastern Ukraine, this is the key railway transport hub in the region.
The leadership of the separatist faction in Donetsk Denis Pushilin.
The War Research Institute (ISW), based in the US Washington capital, said that Russia faced the upcoming defeat at Lyman, which would undergo spiritual erosion during the Russian military mobilization.
If controlling Lynman, the Ukrainian army could threaten Russian positions along the western region of Lugansk province, as well as cause consequences for the Russian troops in the north of Donetsk province.
The Ukrainian army recently launched a counterattack in the Northeast and re -control many territories in Kharkov province.
President Vladimir Putin announced that the military campaign in Ukraine was still implemented according to the plan, and issued a partially mobilized order on September 21 to mobilize about 300,000 reserve soldiers deployed to Ukraine.
The decision to merge 4 Ukrainian territories despite the UN opposition, Russia could increase the Western and more isolated.
The US Research Institute judged that the Russian forces could face failure in the city of Lyman in Donetsk, eastern Ukraine.