The Iranian Revolutionary Guards discovered an electronic monitoring device near the Fordow nuclear site in northern Iran last month, The Sunday Times reported Sunday, citing western intelligence sources.

Soldiers were checking on communications terminals at Fordow when they discovered a rock, according to the report. When the soldiers attempted to move the rock, it exploded, presumably self-destructing.

The device was reportedly capable of intercepting data from computers in Fordow. The Iranians did not report the discovery, according to the Times.

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