The interior ministry said deputy minister Gela Khvedelidze admitted breach of privacy charges over the Internet posting of a secretly-filmed video depicting a threesome purportedly involving journalist Giorgi Paresashvili, who had been running reports accusing high-ranking officials of seizing businesses.
"Gela Khvedelidze, for personal reasons, illegally circulated on the Internet footage of journalist Giorgi Paresashvili's private life," the interior ministry said. "The detainee admitted his guilt."
In separate televised comments, Interior Minister Irakli Garibashvili said the video had been recorded by officials in the previous government of President Mikheil Saakashvili.
In January, prosecutors arrested three top former defence ministry officials of organising the secret filming of gay sex videos allegedly involving prominent individuals to blackmail them into cooperating with the security services.
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Homosexuality is still highly stigmatised in Georgia, a deeply socially conservative ex-Soviet state in the Caucasus whose Orthodox Church retains a strong influence.
Since elections last October, which saw Saakashvili's United National Movement party defeated by Ivanishvili's Georgian Dream coalition, the two leaders have gone through a tense political stand-off.