Ukrainian troops are being hindered by slower speeds on a US satellite system they use on the battlefield to coordinate drone strikes against Russian forces, President Volodymyr Zelensky said on Monday. Zelensky said frontline units had reported that the Starshield equipment "stops functioning at speeds of 130-160 kilometres (80-100 miles) per hour in various sectors of the front", after the Ukrainian leader accused Washington last week of being behind the issue.