A humanitarian boat carrying 12 activists – including Swedish climate campaigner Greta Thunberg – will continue its voyage toward Gaza “until the last minute,” campaigners vowed Sunday, despite an Israeli order to intercept the vessel.

“We’ll stay mobilized until the last moment – until Israel cuts the internet and networks,” European Parliament member Rima Hassan told Agence France-Presse (AFP) from aboard the ship Madleen.

The Madleen, part of the Freedom Flotilla Coalition, set sail from Sicily last week carrying relief supplies in a mission to break Israel’s blockade of Gaza, where the war with Hamas has now entered its 21st month.

“There are 12 of us civilians on board. We are not armed. There is only humanitarian aid,” Hassan said.

Earlier in the day, Israeli Defense Minister Yoav Gallant ordered the military to block the boat from reaching the Palestinian territory.