Ali Barakat became known last year after releasing songs related to Syria's civil war, including one about the opposition stronghold of Yabroud that was captured earlier this year by Syrian troops and Hezbollah fighters.
Barakat was detained yesterday when he went to collect his passport from the General Directorate of General Security in the southern town of Nabatiyeh, his father Mohammed Barakhat said.
"This move violates democracy," Barakat said. In April, authorities issued a summons for Barakat over releasing sectarian songs that "harm Lebanon's relations" with Arab countries.
"When we heard some of his songs that we found not suitable we objected," said the official, who spoke on condition of anonymity because he is not authorized to speak to journalists. "Still, he went on with them."
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Judicial officials said if charged and convicted, Barakat could get six months to three years in prisons for inciting sectarian sentiments and attacking a friendly country. They spoke on condition of anonymity in line with regulations.
Saudi Arabia is one of the main backers of Syrian rebels. Hezbollah has sent its fighters to back Syrian President Bashar Assad.
Ayad was the first Hezbollah member taken prisoner since the group openly joined Assad's forces.