Iran says it will release Israeli nuclear secrets as pressure grows to reimpose sanctions.

Tehran threat comes as European powers press for vote that could lead to reimposition of UN sanctions.

Iran has said it will soon start releasing information from a hoard of Israeli nuclear secrets it claims to have obtained, as European countries push for a vote this week on reimposing UN sanctions on Tehran over its nuclear programme.

The unverified claims by Iranian intelligence of a massive leak of Israeli secrets may be designed to turn the focus away from what Iran argues is its own excessively monitored civil nuclear programme.

On Sunday, Iran’s intelligence minister, Esmail Khatib, claimed Tehran had obtained “a vast collection of strategic and sensitive [Israeli] documents, including plans and data on the nuclear facilities”. He added evidence would be released shortly, and implied some of the documentation was linked to Israel’s arrest of two Israeli nationals, Roi Mizrahi and Almog Attias, over alleged spying for Iran.

Even within Iran there is scepticism that Iranian agents could have obtained such dramatic intelligence. The claim may be designed to warn off Israel from acting on its repeated threat to bomb Iran’s nuclear sites since Iranian insight into Israel’s own nuclear programme would increase the risk of effective Iranian reprisals.

European powers are preparing to press for a vote at the quarterly board meeting of the nuclear inspectorate the IAEA in Vienna, which starts on Monday, that could lead to the reimposition of UN sanctions in October. France, Germany and the UK will cite a 20-page comprehensive report commissioned from the IAEA secretariat on Iran’s failure to comply with the nuclear deal agreed in 2015, and Tehran’s years-long failure to answer questions about aspects of its previous nuclear programme.