All Russian troops have left Kyiv and Chernihiv: US official
All Russian troops have left the Ukrainian cities of Kyiv and Chernihiv, withdrawing north toward the borders of Belarus and Russia to consolidate before likely redeploying to the Donbas region in eastern Ukraine, a senior U.S. defense official told reporters Wednesday.
But even with the Russians gone, the territory remains treacherous.
![](https://s.abcnews.com/images/International/bucha-mines-ap-jef-220405_1649180477927_hpEmbed_3x2_992.jpg)
"There are some indications that they left behind mines and things like that, so the Ukrainians are being somewhat careful in some areas north of Kyiv as they begin to clear the ground and clear the territory and re-occupy it," the official said.
While the U.S. hasn't yet seen these troops redeploy elsewhere in Ukraine, it'll likely happen soon, according to the official. Ukrainian forces are preparing for a major fight in Donbas, the official said.
![](https://s.abcnews.com/images/International/evacuating-gty-ml-220404_1649081686085_hpMain.jpg)
The official also said the Pentagon is "monitoring" an apparent nitric acid explosion in Ukraine's Luhansk region, which Russia blamed on Ukraine.
"We've seen the Russians claim that this was a Ukrainian attack on this. We do not believe that is true," the official said. "We do believe that the Russians are responsible, but exactly what they used when they did it, why they did it, what the damage is, we just don't have that level of detail," the official said.
The official also noted that a small number of Ukrainians currently in the U.S. for "professional military education" were pulled aside for a couple days of training on Switchblade drones, which the U.S. is sending overseas as part of its military aid, according to the official.
"Although it's not a very difficult system to operate, we took advantage of having them in the country to give them some rudimentary training on that," the official said.
-ABC News' Matt Seyler