"The Secretary-General is saddened by the death of H.E. Mr. Seyyed Ebrahim Raeisi, President of the Islamic Republic of Iran, H.E. Mr. Hossein Amir-Abdollahian, Minister for Foreign Affairs, and their colleagues in a helicopter accident on 19 May," said his spokesman Stephane Dujarric in a statement.
Guterres also expressed "his sincere condolences to the families of the deceased and to the Government and people of the Islamic Republic of Iran," said the statement.
The helicopter crashed in a mountainous area of East Azerbaijan Province on Sunday afternoon.
MNA