The blast took place in the cache of ammunitions of a military base in the village of Bidgoneh, in the vicinity of Malard in the Northern Alborz province close to the Iranian capital.
There are yet no reports on the number of casualties or damage to properties by the blast.
Representative of Shahryar at the Iranian parliament Hossein Garrousi said twin blasts shook the cities in the nearby areas.
He said a crisis committee has been set up to investigate the incident.
Several other members of the parliament's National Security and Foreign Policy Commission confirmed the report on the blast in Bidgoneh, saying that it took place at an Islamic Revolution Guards Corps (IRGC) base, Fars reported.