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.