The Guardian reports: Israel is suspected of carrying out a series of leaks implicating Iran in nuclear weapons experiments in an attempt to raise international pressure on Tehran and halt its programme.

Western diplomats believe the leaks may have backfired, compromising a UN-sanctioned investigation into Iran’s past nuclear activities and current aspirations.

The latest leak, published by the Associated Press (AP), purported to be an Iranian diagram showing the physics of a nuclear blast, but scientists quickly pointed out an elementary mistake that cast doubt on its significance and authenticity. An article in the Bulletin of the Atomic Scientists declared: “This diagram does nothing more than indicate either slipshod analysis or an amateurish hoax.”

The leaked diagram raised questions about an investigation being carried out by International Atomic Energy Agency (IAEA) inspectors after it emerged that it formed part of a file of intelligence on alleged Iranian nuclear weapons work held by the agency.

The IAEA’s publication of a summary of the file in November 2011 helped trigger a new round of punitive EU and US sanctions.

Western officials say they have reasons to suspect Israel of being behind the most recent leak and a series of previous disclosures from the IAEA investigation, pointing to Israel’s impatience at what it sees as international complacency over Iranian nuclear activity.

The leaks are part of an intensifying shadow war over Iran’s atomic programme being played out in Vienna, home to the IAEA’s headquarters.

The Israeli spy agency, the Mossad, is highly active in the Austrian capital, as is Iran and most of the world’s major intelligence agencies, leading to frequent comparisons with its earlier incarnation as a battleground for spies in the early years of the cold war. The Israeli government did not reply to a request for comment and AP described the source of the latest leak only as “officials from a country critical of Iran’s atomic programme”.