A spokesman for Iran's civil aviation told state TV that the plane belonged to Kyrgyzstan.
A Boeing 707 cargo plane with nine people on board crashed in Iran, the Fars news agency reported, adding that there was no immediate information on casualties.
The plane was reportedly carrying meat from Kyrgyzstan.
IRIB said the plane hit a building after the pilot chose the wrong runway while trying to land at Fath airport in Alborz province, just east of Tehran.
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Rescuers say the bodies of seven people have been recovered with searches continuing.
Iran's Red Crescent Society has dispatched eight rescue teams, including several ambulances and a helicopter, to the site.
A spokeswoman for the Manas airport said the plane belonged to Iran's Payam Air.
Iranians often use the word "martyrdom" for those who die in war or national service, suggesting the aircraft may have belong to the air force.
The Iranian air force does operate Boeing 707s and it also has a civilian airline, SAHA. Another official told Fars that 10 people were on board and that they were all feared killed.