A Russian military helicopter has reportedly been shot down in the conflict zone in Ukraine.

German aviation giant Lufthansa has warned of growing uncertainty due to the escalating conflict in the Middle East, saying the crisis highlights how vulnerable global air travel remains to geopolitical shocks.

Global aviation has entered a period in which disruption is no longer an exception but a recurring condition.

China's civil aviation regulator announced on Friday that it is implementing concrete measures to address potential safety risks and ensure the safe operation of airlines, following recent safety incidents in the industry.