Tunisian authorities have denied claims that one of the Gaza-bound vessels carrying aid and pro-Palestinian activists including Greta Thunberg was attacked by a drone. The organisers of the flotilla, Global Sumud Flotilla (GSF), said that the Portuguese-flagged vessel had been struck by a drone while anchored outside the port of Sidi Bou Said in Tunisia. All six passengers and crew were safe, they added. A spokesperson for Tunisia's national guard told the Agence France-Presse news agency that 'no drone' had been detected and the investigation was ongoing. The humanitarian aid flotilla set sail from Barcelona last week and arrived in Tunisia on Sunday. The GSF said their 'Family boat' was struck in Tunisian waters, and fire had damaged the main deck. In a series of videos published to their Instagram, spokespeople for the GSF said an 'incendiary device' caused a fire onboard the vessel, which the crew was able to extinguish. Tunisia's National Guard spokesman disputed the reports of a drone attack, asserting they 'have no basis in truth.' An initial inspection indicated the explosion originated inside the vessel. UN Human Rights Council special rapporteur and Tunisian resident Francesca Albanese, who was featured in videos shared by the GSF, stated that if an attack could be verified, it would be considered an 'assault and aggression against Tunisia, and Tunisian sovereignty.' Albanese has been a vocal critic of Israel's actions in Gaza. Flotilla organisers mission aims to 'break Israel's illegal siege on Gaza,' but they have faced several setbacks in the past. Previous allegations of drone attacks on aid ships and the humanitarian situation in Gaza remains dire, with international scrutiny intensifying.