Iranian Foreign Ministry Spokesman Seyyed Abbas Mousavi says Tehran is investigating the details of the Thursday night's incident involving a Beirut-bound Mahan Air flight.

In a statement on Thursday, Mousavi said Iran will take necessary political and legal actions once the investigation is completed.

"Meanwhile, Iran's permanent representative and ambassador to the United Nations Majid Takht-Ravanchi has explicitly emphasized to UN Secretary General Antontio Guterres that Iran will hold the US responsible if anything happens to this airplane in its way back," Mousavi added.

The message has also been conveyed to the Swiss ambassador to Tehran, whose country protects the US interests in Iran, he noted.