Russia's nuclear-capable Oreshnik missile system has entered active service, Russia's Ministry of Defense says, as negotiators continue to search for a breakthrough in peace talks to end Moscow's war in Ukraine. Troops held a brief ceremony to mark the occasion in neighboring Belarus where the missiles have been deployed, the ministry says. It did not say how many missiles had been deployed or give any other details. The announcement comes at a critical time for peace talks, with negotiators still searching for a breakthrough on key issues, including territory and control of the Zaporizhzhia nuclear power plant.