According to the statement, the explosions were in Parchin, about 30 km south of Tehran, and sparked a large fire which caused some injuries to personnel at the site.
Many firefighting and rescue squads were called to put out the fire. In the statement, the opposition group who are linked with the Mojahedin-e-Khalq movement, maintains that the Iranian government are trying to prevent the publication of the blasts, and therefore only said that a fire raged at the site, but was quickly extinguished.
Over the last four years, the group has divulged classified information regarding Iran's nuclear program, including locations of nuclear sites that the Iranian government failed to report to the International Atomic Energy Agency.
Following continuous reports of nuclear development at Parchin, IAEA and U.S. officials demanded to inspect the site. However, only after several months did Iran agree to allow nuclear inspectors from the United Nations into the major military complex.