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

The almost 20 months of war has torn Gaza apart, often displacing residents multiple times and killing more than 54,000 people, according to the Hamas-run Health Ministry. A U.S.-brokered ceasefire agreed in January collapsed in March as Israel enforced a blockade on all humanitarian aid into the strip.

Greta Thunberg and other activists are sailing to Gaza with aid, but Israel has vowed to prevent their entry, citing the need to maintain its naval bl