The Global Sumud Flotilla (GSF) for Gaza said on Tuesday that one of its main boats was struck by a drone at a port in Tunisia, though all six passengers and crew were safe, Reuters reports.

Tunisia's interior ministry said that reports of a drone hitting a boat at its Sidi Bou Said port "have no basis in truth", and that a fire broke out on the vessel itself.

The Portuguese-flagged boat, carrying the flotilla's steering committee, sustained fire damage to its main deck and below-deck storage, the GSF said in a statement.

The flotilla is an international initiative seeking to break Israel's naval blockade and deliver humanitarian aid to war-torn Gaza using civilian boats supported by delegations from 44 countries, including Swedish activist Greta Thunberg.

Thunberg confirmed the incident and emphasized that the main purpose of her trip is to draw attention to the humanitarian disaster in Gaza.