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

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.

Freedom Flotilla Coalition's Madleen was forcibly intercepted by the Israeli military on Monday as it approached the Gaza Strip. The 12 activists on board the ship, including Greta Thunberg, have been detained by Israel for "interrogation" and will be taken to the Ashdod port.