The Russian Defense Ministry said it launched a rocket attack that killed 600 Ukrainian troops in Kramatorsk.
There was no comment from the military.
The ministry said that more than 600 Ukrainian servicemen were killed in a missile attack.
The ministry said the attack was in response to the attack on Russian soldiers in Kramatorsk. The Kremlin said 89 Russian service members were killed in the strike.
The attack came hours after the end of a partial cease-fire.
Bradley vehicles will be sent to Ukrain under a Cease-fire order.
There are other developments.
In the finals of a tennis tournament in Thailand, a Ukrainian tennis player beat a Russian.
The air force exercises will take place in January and February. Since the Ukrainian invasion, Russia has been close to Belarus.
The Christmas cease-fire is said to be in jeopardy.
The British Defense Ministry says that Russia has been fortifying its fortifications in Zaporizhzhia in order to prevent a major Ukrainian breakthrough in the southeastern region. In its latest assessment of the war, the ministry says the Russians are concerned that Ukrainian success in the Luhansk region would undermine the Kremlin's war aim.
"Deciding which of these threats to prioritize is likely one of the central dilemma for Russian operational planners," the assessment says.
The Associated Press contributed to the story.
This article was originally published on USA TODAY.