'Ukraine said its troops attacked and partially destroyed a column of armed vehicles that had crossed the border from Russian territory, while Russia said it was concerned about an attack on another convoy carrying aid.
Ukrainian government troops engaged the vehicles that had arrived overnight through a rebel-held section of the border, Andriy Lysenko, a spokesman for the country’s military, told reporters in Kiev today. Ukrainian soldiers continue to come under shelling, including rounds fired from Russia, he said.'
Ukraine Says It Destroyed Part of Armed Convoy From Russia - Bloomberg
Is this a one time mistake or an escalation?