Satellite imagery taken on Saturday showed Russian ground forces assembled in Nova Kakhovka, Ukraine, at and near the Kakhovka hydroelectric power plant on the Dnieper River, a private U.S. company said.
The images, released by Maxar Technologies, showed trucks on the dam for the hydroelectric plant as well as others parked on a road. Nova Kakhovka is in southern Ukraine.
The images released by Maxar, which has been tracking the buildup of Russian forces for weeks, could not be independently verified by Reuters.