Ukraine's access to Elon Musk's Starlink internet service was restricted without advance warning overnight, disrupting battlefield operations against Russian troops, Ukrainian officials said on Wednesday.SpaceX, the company that operates Starlink, put a "speed limit" on Starlink terminals in Ukraine, Serhii Beskrestnov, an adviser to Ukraine's presidential office, said in a post to the Telegram messaging app.Ukraine depends heavily on Starlink terminals and the thousands of satellites orbiting close to the Earth to maintain communications and pilot its extensive drone fleets.