Dramatic footage of the ambush – the second in three days – purports to show at least one Russian tank and one armoured personnel carrier hit by missiles fired from behind a copse of trees.
MAILONLINE LIVEBLOG: Russia said another ceasefire would start today in Ukraine with the opening of humanitarian corridors in several areas, including Kyiv, Mariupol, Kharkiv and Sumy.
Russian forces are said to have taken a small Ukrainian town in the south of the country. Berdyansk, a port city on the northern coast of the Sea of Azov is home to 100,000 people.
It is suspected the markings have been allocated for specific roles amid rising tensions over an imminent invasion, with footage showing the letters sprayed on tanks and self-propelled guns.
Frantic diplomacy was continuing in Europe on Monday, with Germany’s chancellor in Kiev ahead of his visit to Moscow, and world leaders urging calm and demanding the other side take a step back.