A small plane crashed at Mehrabad airport, near Tehran, killing more than 40 passengers, Iranian state media report.
The aircraft went down at Mehrabad airport, in the west of the city, on Sunday morning, state media said.
The plane was reportedly heading to the eastern city of Tabas when it crashed at 04:48 GMT.
Iran has suffered a series of plane crashes, blamed on its ageing aircraft and poor maintenance record.
There have been more than 200 accidents involving Iranian planes in the past 25 years, leading to more than 2,000 deaths.
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