Ayatollah Ahmad Jannati, who is close to Iran’s supreme leader, has made the announcement in a Friday prayer sermon. He says the detained staffers “made confessions.”

Jannati does not say how many staffers will be tried or on what charges. Earlier Iranian officials said all but one of the eight embassy personnel arrested on June 27 had been released, but European Union officials said they believed more than one was still being held.

Jannati is the head of the Guardian Council, a powerful body in Iran’s clerical rule, and is close to supreme leader Ayatollah Ali Khamenei.

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