Self-proclaimed Prime Minister of Crimea Sergey Aksyonov announced his intention to close the airspace over Crimea on March 16, the day of the referendum on accession to Russia.

 He wrote this on his Twitter page, accrording to Ukrinform.

"For security reasons, the airspace over Crimea at the time of the referendum will be closed," Akiosnov said.

Meanwhile, Simferopol airport in Crimea receives Russian flights only.

Officially, the reason named is “technical limitations”.

The control point of the airport reportedly came under control of “self-defense groups” of Crimea.