Activists say they believe Israel struck the vessel but Tunisian authorities have said there is no evidence of this.

Organisers of a Gaza-bound flotilla carrying Greta Thunberg and other pro-Palestinian activists have claimed one of their boats was struck by a drone on Monday.

Yasemin Acar, one of the activists travelling with Greta on the Family Ship, published video to her Instagram story in which she said: 'The Family boat has been officially attacked a drone came right...