<p>Ukraine on Sunday advised airlines to avoid flying over the open waters of the Black Sea from Monday to Saturday due to Russian naval exercises taking place there.</p>.<p>More than 30 Russian ships have started training exercises near the Crimea peninsula as part of wider navy drills, RIA news agency reported on Saturday.</p>.<p>"From tomorrow, airlines are advised not to fly ...over this area, and to plan optimal routes in advance, taking into account the current situation," Ukraine's state air traffic service said.</p>.<p>It said the airspace over the territory of Ukraine remained open.</p>.<p>A senior Ukrainian official said on Sunday that Ukraine sees no point closing its airspace in response to Moscow's troop build-up, as Dutch airline KLM - part of Air France - said it would stop flying to Ukraine and Germany's Lufthansa said it was considering suspending flights.</p>.<p>The United States has said Russia could invade Ukraine at any time. Moscow denies any plan to invade, saying it is maintaining its own security against aggression by NATO allies.</p>.<p><strong>Check out the latest videos from <i data-stringify-type="italic">DH</i>:</strong></p>
<p>Ukraine on Sunday advised airlines to avoid flying over the open waters of the Black Sea from Monday to Saturday due to Russian naval exercises taking place there.</p>.<p>More than 30 Russian ships have started training exercises near the Crimea peninsula as part of wider navy drills, RIA news agency reported on Saturday.</p>.<p>"From tomorrow, airlines are advised not to fly ...over this area, and to plan optimal routes in advance, taking into account the current situation," Ukraine's state air traffic service said.</p>.<p>It said the airspace over the territory of Ukraine remained open.</p>.<p>A senior Ukrainian official said on Sunday that Ukraine sees no point closing its airspace in response to Moscow's troop build-up, as Dutch airline KLM - part of Air France - said it would stop flying to Ukraine and Germany's Lufthansa said it was considering suspending flights.</p>.<p>The United States has said Russia could invade Ukraine at any time. Moscow denies any plan to invade, saying it is maintaining its own security against aggression by NATO allies.</p>.<p><strong>Check out the latest videos from <i data-stringify-type="italic">DH</i>:</strong></p>