Israel's defence minister has threatened to "take whatever measures necessary" to stop an aid boat carrying Greta Thunberg from reaching Gaza.
The climate campaigner, 22, is one of a dozen activists aboard the Madleen, which set sail from Sicily last Sunday on a mission aiming to break Israel's sea blockade.
The activists have said they plan to reach Gaza's territorial waters as early as Sunday to deliver humanitarian aid.
But in a post on X, Israel's defence minister Israel Katz said he has instructed the IDF to prevent the vessel reaching shore and to "take whatever measures necessary".
Addressing Thunberg and the other activists, he said: "You should turn back - because you will not reach Gaza."
He wrote: "I have instructed the IDF to act so that the "Madeleine" hate flotilla does