European Union leaders holding an unprecedented summit about Britain's departure from the bloc are condemning a deadly attack on Istanbul's Ataturk airport.

Belgian Prime Minister Charles Michel tweeted from a closed-door meeting Tuesday in Brussels, "Despicable terror attack. Stand together with people of Turkey."

Dalia Grybauskaite, president of Lithuania, wrote "Our thoughts are with the victims of the attacks at Istanbul airport. We condemn those atrocious acts of violence."

The 28 EU leaders are meeting for an exceptional summit at which Prime Minister David Cameron announced his country has voted to leave the EU. They are also discussing migration via Turkey to the EU.

For information, two explosions rocked Istanbul's Ataturk airport Tuesday, killing at least 36 people. Turkish Justice Minister says this figure may rise up to 50. No Georgian citizens were identified there as a victims as yet.

Three suicide bombers have died in the attack at Istanbul's Ataturk airport. So far all indications point to the Islamic State group being behind the attack. As Binali Yildirim, Turkish Prime Minister say the attackers arrived at the airport in a taxi and blew themselves up after opening fire.