March 31 (Reuters) - Russia said on Friday that a ceasefire in Ukraine would not enable it to achieve the goals of its "special military operation" at the moment. The Kremlin was reacting after Belarusian President Alexander Lukashenko - Russia's closest ally - called for an immediate ceasefire, without preconditions, and for both Moscow and Kyiv to start negotiations on a lasting peace settlement. See here for a complete list of exchanges and delays