Satellite images taken on Monday show a Russian military convoy north of the Ukrainian capital of Kyiv that stretches for about 64 kilometres, substantially longer than 27 kms as reported earlier.
Images provided by Maxar Technologies show Russian convoy covering the stretch of road from near Antonov airport to the town of Prybirsk.
A number of homes and buildings can also be seen burning north and northwest of Ivankiv, near the roads where the convoy is travelling.
Additional ground forces deployments and ground attack helicopter units were seen in southern Belarus, less than 32 kilometres north of the Ukraine border, said Maxar.
Since the start of the Russian invasion last Thursday, Ukrainian forces have defended the roads leading into central Kyiv against assaults by Russian forces that are massing around the capital.
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The Russian army on Monday urged Ukrainians to leave Kyiv "freely" on one highway out ahead of what is an expected Russian offensive to capture the capital.