Iranian television is reporting the crash of a military Antonov An-74 at Tehran airport, killing 36 people.
Report say the aircraft was operated by the country's élite Iranian Revolutionary Guards corps (IRGC). Flight International's World Air Forces directory lists the country's military as operating seven of the types. It is understood that the IRGC operates three of these. The Islamic Republic News Agency is showing the register as 15-2255 (see picture below).
The Revolutionary Guards corps has started its own investigation in addition to an official air accident investigation.
The crash comes a week after Iran's Greatest Prophet military excercises.
Iran has suffered a series of airviation safety disasters in recent years, with the crash of an Iran Air Tours-operated Tupoloev Tu-154M that crashed in Mashhad in September killing around 28 people; the crash of a Dassault Falcon 20 operated by the IRGC in January that killed 11; and the collision of an aircraft into an apartment block in december that killed around 120 people.