Israel vowed on Sunday to stop an aid boat carrying Greta Thunberg and other activists on board from reaching Gaza.

The attempt to block the flotilla carrying the famed climate activist comes 15 years after a similar aid effort ended in deadly violence.

Israel’s defense minister has ordered the military to prevent a Gaza-bound aid flotilla carrying Greta Thunberg from reaching its destination, citing national security concerns and a refusal to allow any breach of Israel’s blockade.