Ukraine has closed its airspace to civilian flights after Russia began military action in the country’s east, BBC reported.

It cited a high risk to flight safety due to the use of weapons and military equipment in the Donbas region.

The European Union Aviation Safety Agency warned of additional safety risks in flying in bordering airspace in Russia and Belarus.

“There is a risk of both intentional targeting and misidentification of civil aircraft,” the regulator said.

“The presence and possible use of a wide range of ground and airborne warfare systems poses a high risk for civil flights operating at all altitudes and flight levels.”