Israel’s government has vowed to prevent an aid boat carrying Greta Thunberg and other activists from reaching the Gaza Strip.

The boat Madleen, operated by Freedom Flotilla Coalition, embarked from the Sicilian port of Catania in southern Italy for the shores of Gaza Strip on June 1.

The group is carrying supplies for Gazan Palestinians and protesting what they say is “Israel’s “illegal, decades-long blockade, and ongoing genocide” in the enclave.