European Union leaders have reacted to news of the Ukraine International Airlines crash soon after take off from Tehran.

President of the European Commission, Ursula von der Leyen, sent her «deepest condolences to all who lost their beloved ones,» in a Wednesday statement.

«At this moment it is for the aviation security experts to investigate the cause of the crash providing answers to this horrible tragedy,” she added.

Boyko Borissov, Bulgarian Prime Minister, said he empathized «with the pain and suffering of the loved ones of the casualties,» in a Twitter post.