Thunberg’s boat was intercepted by the IDF on its way to deliver humanitarian aid to the Gaza Strip amid Israel’s blockade in Palestine. After intercepting the Madleen, a civilian ship carrying humanitarian aid with a number of high-profile passengers on board,

An aid vessel launched by Greta Thunberg and other international activists headed for Gaza was boarded by Israeli forces on Sunday, mere hours after Israeli officials demanded they “turn back,” the coalition announced in a Telegram post.

There are a number of things that could cause the ship to turn around, like lack of food and water or problems with the engine.