The images showed one large helicopter deployment near the Belarusian town of Chojniki, which had over 90 helicopters parked on a road with the deployment extending for more than five miles.
Images also showed a large deployment of ground forces with several hundred vehicles in convoy position in several fields.
Satellite pictures show a large deployment of helicopters southeast of Chojniki, Belarus, near the border with Ukraine.
The Russian army has targeted Ukraine's military infrastructure with cruise missiles from the air and sea, Ukraine's defence ministry said on Saturday.