Pro-Russian rebels have begun the pullback of weapons with a caliber smaller than 100 mm, including tanks and armored vehicles, officials from self-proclaimed republics of Donetsk and Luhansk announced on Sunday. The weaponry is to be relocated at least 3 kilometers (1.9 miles) from the combat zones.

"That is our unilateral step towards peace. We are showing the whole world that we are fulfilling the Minsk Agreement," the head of the Luhansk separatist militia Sergei Koslov said, according to local media cited by the dpa news agency.

The pullback could be completed by late Sunday, according to the rebels.

However, the pro-Russian forces could bring them back "if the Ukrainian side attempts to breach the front line, or conducts shelling endangering the lives of civilians or Donetsk army" senior rebel commander Eduard Basurin told the local news agency DAN.

Kyiv forces have not received orders to pull their own guns back, in response to the alleged rebel move, a Ukrainian army spokesman said on Sunday.

The blame game

Both sides had already agreed to withdraw the larger weapons, above the 100-mm limit, in February. But neither side has fully complied with the agreement, according to the Organization for Security and Cooperation in Europe.

On Sunday, Basurin accused Ukrainian army of targeting downtown Donetsk with 152-mm artillery. At least two civilians were killed in the shelling, separatists claimed.

In turn, the Ukrainian army officials accused the rebels of firing 152 and 122-mm shells into the area near the Donetsk airport, killing one civilian and injuring several others.

More than 6,400 people have been killed since the war started in April 2014, according to the United Nations.

dj/sms (Interfax, dpa, AP, AFP, Reuters)