Shooting down Russian planes will lead to war, a Kremlin envoy has said in a chilling warning to NATO.The threat comes amid rising tensions between Moscow and its European neighbours with Russia accused of violating their airspace after a number of drone incursions. Poland is looking to pass a law that will allow its military to down Russian drones over Ukraine without needing approval from NATO or the European Union after multiple crossed into their territory earlier this month. Estonia's airspace was also violated by three Russian fighter jets on Friday, while Moscow has been accused of being behind a swarm of drones that shut down Copenhagen airport on Monday.US President Donald Trump warned that NATO countries could shoot down Russian aircrafts which infringe on their airspace during a speech at the United Nations on Tuesday.But Alexey Meshkov, Russia's ambassador to France, has fired back, stating that gunning down their aircrafts 'would be war'.'You know, there are many NATO planes that violate Russian airspace, deliberately or not, but it happens quite often. They are not shot down afterward,' he told RTL, without providing an example. He doubled down on Russia's denial of any involvement in recent drone incursions across Eastern Europe. Shooting down Russian planes will lead to war, a Kremlin envoy said in a chilling warning to NATO