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Lebanese authorities have reportedly arrested an Egyptian opposition activist upon his return from Syria, where he had participated in celebrations following the deposing of Bashar al-Assad.

Abdul Rahman Al-Qaradawi was detained at Beirut International Airport after his return from Syria, after alleged cooperation between Lebanese and Egyptian authorities to track down opposition activists living abroad, °®Âþµº's Arabic-language site, Al-Araby Al-Jadeed reported.

The activist documented his time in Syria and posted online videos of himself celebrating the fall of the Assad regime in front of Damascus's famous Umayyad Mosque, earlier this month.

Al-Qaradawi is reportedly wanted in Egypt, though it remains unclear on what charges. Several journalists and fellow activists have called for his release, while his family was reportedly unaware of his whereabouts, according to Arabic-language media outlets.

Many have taken to social media to criticise Lebanese authorities for arresting Al-Qaradawi, calling the move "shameful" as several Assad regime-linked individuals were "still roaming free" in the country and broader region.

Human rights campaigners are reportedly working to secure al-Qaradawi's release and his return to his place of residence in Turkey.

Al-Qaradawi is a published poet and activist, having supported and participated in the 2011 Egyptian Revolution which saw the ouster of long-term President Hosni Mubarak.

He is also the founder of a number of campaign groups in opposition to Mubarak such as the "Kifaya" (Enough) movement, the National Association for Change, and the Egyptian Campaign Against Succession.

After 2011, he was prohibited from publishing and working in journalism and television for his opposition to the current Egyptian government.

He also worked on the campaign for Mohammed ElBaradei, a prominent Egyptian lawyer whoÌýat the time, was a potential challenger for Egypt’s transitional government following Mubarak’s fall.

He is also the son of scholar and preacher Yusuf al-Qaradawi, an author of over 120 books who had a significant role in influencing the intellectual leadership of the Muslim Brotherhood.

Egypt is notorious for arresting and jailing political activists, often on bogus charges or without trial. Several campaigners from the 2011 uprising era have been imprisoned over the years, notably Alaa Abdel-Fattah.