It comes after Azerbaijan Airlines Flight 8243 was severely damaged while coming to land at Grozny, the capital of Russia’s Chechnya, on Christmas Day.

Of the 67 people on board, 38 died. Azerbaijan’s president and a White House official have said the Embraer E190 appeared to have been shot by Russian air defense systems.

“The ongoing conflict following the Russian invasion of Ukraine poses the risk of civil aircraft being unintentionally targeted in the airspace of the Russian Federation,” EASA said in Thursday’s bulletin.

The warning applies to Russian airspace west of the 60th meridian east, which includes the cities of Moscow, Saint Petersburg, and Yekaterinburg.

EASA said Russia “has not demonstrated full proficiency to address existing airspace risks by implementing an efficient and proactive approach to the airspace deconfliction.”