Iran civil aviation boss 'certain' Ukraine plane not hit by missile

Iran's civil aviation chief Ali Abedzadeh said Friday he was "certain" a Ukrainian airliner which crashed outside Tehran this week was not hit by a missile.

"One thing is for certain, this airplane was not hit by a missile," Abedzadeh told a news conference in Tehran after Britain and Canada both said intelligence sources suggested a catastrophic error by Iranian air defense batteries had downed the aircraft.