The Madleen is nearing Gaza's territorial waters.
ADVERTISEMENT
Defence Minister Israel Katz said on Sunday that Israel wouldn't allow anyone to break its naval blockade of the Palestinian territory, which he said was aimed at preventing Hamas from importing arms.
In a post on X Katz announced that he has instructed the Israeli Defence Force "to act to prevent the Madleen hate flotilla" from reaching the strip's coast: "You should turn back - because you will not reach Gaza."
Thunberg is among 12 activists aboard the Madleen, which is operated by the Freedom Flotilla Coalition. The vessel departed Sicily last Sunday on a mission that aims to break the sea blockade of Gaza and deliver humanitarian aid, while raising awareness over the growing humanitarian crisis in the Palestinian enclave.
The activists had said they planned to reach Gaza’s territorial waters as early as Sunday.
Rima Hassan, a French member of the European Parliament who is of Palestinian descent, is among the others onboard. She has been barred from entering Israel because of her opposition to Israeli policies toward the Palestinians.
Also on board is "Game of Thrones" star Liam Cunningham.
After a three-month total blockade aimed at pressuring Hamas, Israel started allowing some basic aid into Gaza last month, but humanitarian workers have warned of famine unless the blockade and the war end.
An attempt last month by Freedom Flotilla to reach Gaza by sea failed after another of the group’s vessels was attacked by two drones while sailing in international waters off Malta. The group blamed Israel for the attack, which damaged the front section of the ship.
Israel denied the allegations.