Iranian President Hassan Rouhani Saturday said his country "deeply regrets" the shooting down of a Ukrainian airliner, which he described as "a great tragedy & unforgivable mistake".
"Armed Forces' internal investigation has concluded that regrettably missiles fired due to human error caused the horrific crash of the Ukrainian plane & death of 176 innocent people," he added on Twitter.
"Investigations continue to identify & prosecute this great tragedy & unforgivable mistake."
