Ukrainian President Volodymyr Zelenskyy and US President Joe Biden had a tele communication on Sunday, the spokesman for Ukraine’s leader said. The two leaders “discussed the security situation and ongoing diplomatic de-escalation efforts”, the official added. Ukrainian State Air Traffic Services Enterprise (UkSATSE) on Sunday advised airlines to avoid flying over Black Sea from Monday to Saturday amid Russian naval drills. UkSATSE also asked airlines to plan optimal routes in advance considering region’s current state. Meanwhile, over 30 ships from the Russian Black Sea fleet started training exercises near the Crimea Peninsula on Saturday
