That's according to CNN, Ukrinform reports.
The images show a 13-kilometer-long military convoy moving south through the town of Velykyi Burluk in eastern Ukraine on April 8.
Maxar reported that the convoy consists of "armored vehicles, trucks with towed artillery and support equipment."
Earlier, the Ukrainian Defense Ministry said that Russia was concentrating forces in eastern Ukraine, attempting to capture Kharkiv, Mariupol and Odesa.
Major General Kyrylo Budanov, head of the Main Intelligence Directorate of the Ukrainian Defense Ministry, said that Russian forces were regrouping in eastern Ukraine and planning to advance to Kharkiv.
Screenshots: Maxar Technologies