The bulk of Russian ground forces are currently about 25 kilometers (15.5 miles) from the center of the Ukrainian capital, Kyiv, the UK's Ministry of Defence said Saturday in its latest intelligence assessment.
Fighting north-west of Kyiv continues with the bilk of Russian ground forces now around 25 kilometers from the center of the city," the ministry said.
"Elements of the large Russian column north of Kyiv have dispersed. This is likely to support a Russian attempt to encircle the city. It could also be an attempt by Russia to reduce its vulnerability to Ukrainian counter attacks, which have taken a significant toll on Russian forces," the ministry said.
CNN teams in Kyiv reported explosions in the early hours of Saturday morning, but it's unclear whether the explosions were Russian or Ukrainian strikes.
The other key cities of Kharkiv, Chernihiv, Sumy and Mariupol remain encircled by Russian forces, the ministry added.