Israel's foreign ministry has branded it a "selfie yacht", while Thunberg says she has been "kidnapped" after Israeli forces boarded the vessel.

In a pre-recorded video released by the Freedom Flotilla Coalition Thunberg said: "If you see this video, we have been intercepted and kidnapped."

Israel has intercepted a Gaza-bound aid ship carrying Greta Thunberg and other prominent activists, detaining those onboard, with the vessel being taken to Israel.