The International Atomic Energy Agency’s Board of Governors is meeting in Vienna this week to discuss whether they should propose a motion to hold another meeting at another Olde World capital, at which they might draft another strongly worded letter to Iran, possibly even a harshly worded letter but with some attractive incentives, and one of the items they may discuss is the new evidence that Iran is hiding a secret nuclear weapons site. (Hat tip: Killian Bundy.)

Fresh evidence has emerged that Iran is working on a secret military project to develop nuclear weapons that has not been declared to United Nations inspectors responsible for monitoring Iran’s nuclear programme.

Nuclear experts working for the International Atomic Energy Agency in Vienna are pressing the Iranians to make a full disclosure about a network of research laboratories at a secret military base outside the capital Teheran.

The project is codenamed Zirzamin 27, and its purpose is to enable the Iranians to undertake uranium enrichment to military standard. Zirzamin means “basement” in Farsi, which suggests the laboratories are underground and 27 refers to the 27-year-old Iranian revolution.

Concerns over activity at Zirzamin 27 will be raised at this week’s meeting of the IAEA’s Board of Governors in Vienna, which starts today.

Suspicions have been growing that Iran has a secret military nuclear research programme since UN inspectors discovered particles of enriched uranium at a research complex at Lavizan, a military base on the outskirts of Teheran, in 2003.