Ukrainian security cheif says Russian forces spotted in both major rebel-held cities in eastern Ukraine

The transcript discusses the concentration of Russian military forces in occupied areas and the use of so-called humanitarian convoys to support these forces. It highlights the illegal crossing of white trucks at the border, accompanied by armed escorts. The report concludes with a mention of casualties among Ukrainian military personnel.

What has been noted about the illegal crossing of the border by white trucks?

What were the reported casualties among Ukrainian servicemen?