An explosion that rattled Iran’s capital came from an area in its eastern mountains that analysts believe hides an underground tunnel system and missile production sites, satellite photographs showed Saturday.
What exploded in the incident early Friday that sent a massive fireball into the sky near Tehran remains unclear, as does the cause of the blast.
The unusual response of the Iranian government in the aftermath of the explosion, however, underscores the sensitive nature of an area near where international inspectors believe the Islamic Republic conducted high-explosive tests two decades ago for nuclear weapon triggers.
Is this another Big Hole Incident?
At first I just assumed the most logical explanation was an accident rather than an attack. That might still be the case, I suppose, despite the odd Iranian response.
What happened there?
UPDATE: Is this what happened?
The explosion appears to have struck a facility for the Shahid Bakeri Industrial Group, which makes solid-propellant rockets, said Fabian Hinz, a researcher at the James Martin Centre for Nonproliferation Studies at the Middlebury Institute of International Studies in Monterey, California.
The Washington-based Centre for Strategic and International Studies identified Khojir as the “site of numerous tunnels, some suspected of use for arms assembly”. Large industrial buildings at the site visible from satellite photographs also suggest missile assembly being carried out there.
Hmmm.