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

Five days after climate activist Greta Thunberg set sail Sunday afternoon along with 11 other activists on a ship carrying aid to Gaza, the group could soon near Israeli waters. Israeli officials have vowed not to allow the ship,

Thunberg, a climate campaigner, is among 12 activists aboard the Madleen, which aims to break the blockade of Gaza and deliver humanitarian aid.