Beyond protest: Greta Thunberg joins risky voyage to Gaza 

October 3, 2025

Swedish climate activist Greta Thunberg has been detained by Israeli forces during a maritime mission aimed at breaking the blockade of Gaza. Her detention came as part of a larger interception of the Global Sumud Flotilla (GSF), which sought to deliver humanitarian aid to the besieged enclave. The incident has drawn protests, diplomatic reactions, and debate over the legality of Israel’s actions at sea.

The flotilla, described by organisers as one of the largest in recent years, comprised more than 40 boats carrying around 500 participants, including parliamentarians, lawyers, and international activists. It departed from Barcelona on August 31, 2025, and picked up additional vessels from ports in Spain, Italy, and Turkey before heading toward Gaza. Organisers said the mission’s aim was to transport food, water, and medicine directly to civilians, bypassing Israeli-controlled channels.

Framing their effort as a non-violent and symbolic stand, flotilla organisers argued that the voyage sought to draw international attention to Gaza’s worsening humanitarian situation. They called it a moral duty to challenge the restrictions that Israel has maintained since Hamas took control of Gaza in 2007.

The mission was halted on Wednesday evening when Israeli naval forces intercepted the first vessels about 70 nautical miles from Gaza. Footage shared by both the Israeli Foreign Ministry and flotilla participants showed tense exchanges between soldiers and activists. In one video, Thunberg was seen sitting on a deck surrounded by armed Israeli personnel.

The Israeli Foreign Ministry confirmed her detention, saying: “Several vessels of the Hamas-Sumud flotilla have been safely stopped and their passengers are being transferred to an Israeli port. Greta and her friends are safe and healthy.”

Organisers accused Israel of using aggressive tactics, claiming one ship had been rammed and others targeted with water cannons. A video posted online appeared to show the vessel Yulara being doused, though no injuries were reported. The flotilla’s organisers further alleged that Israeli forces jammed communications and cut live video streams during the operation. Messages on Telegram suggested some activists had been forcibly taken to Israel against their will.

By early Thursday, 13 boats had been stopped, but organisers insisted the remaining 30 were pressing ahead, declaring that “the flotilla will continue undeterred.” They estimated they were 46 nautical miles from Gaza and pledged to persist unless intercepted again.

Israel defended the interception, saying it had repeatedly warned the flotilla not to enter a “combat zone” and had offered Ashkelon as an alternative entry point for aid supplies. Officials described the convoy as a political act rather than a relief effort. Jonathan Peled, Israel’s ambassador to Italy, said: “This systematic refusal to hand over the aid demonstrates that the objective is not humanitarian, but provocative.”

At the United Nations, Israeli envoy Danny Danon dismissed the flotilla as a “PR stunt” and warned that participants would be deported after the Jewish holiday of Yom Kippur. “We will not allow any PR stunt approaching an active war zone to violate our sovereignty,” he said.

Israel also alleged that the flotilla was linked to Hamas through the Palestinian Conference for Palestinians Abroad (PCPA), which it describes as Hamas’s representative body overseas. Officials cited documents allegedly recovered in Gaza, including a 2021 letter from former Hamas leader Ismail Haniyeh endorsing the PCPA, and listed flotilla organiser Zaher Birawi as a senior figure in the group. Israel designated the PCPA as a terrorist organisation in 2021.

Flotilla organisers rejected the allegations, calling them propaganda, and reiterated that their mission was entirely non-violent and humanitarian.

The incident quickly escalated into a diplomatic row. Turkey condemned the interception as “an act of terror” and saw street protests in Istanbul. In Latin America, Colombian President Gustavo Petro announced the expulsion of Israel’s diplomatic mission, despite the fact that Israel has had no ambassador in place there since last year.

The fate of Thunberg and other detained activists remains a point of international attention, with organisers vowing that the mission to deliver aid to Gaza will not be abandoned.