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Israeli forces boarded and seized the Marinette on October 3, 2025, a Polish-flagged vessel carrying six crew members, about 42 nautical miles from Gaza. Marinette was the final vessel of the Global Sumud Flotilla, ending the largest maritime aid mission yet attempted to break the Gaza blockade.

The seizure of Marinette was the last operational boat of the Global Sumud Flotilla, which initially consisted of 44 ships and approximately 500 activists from 46 countries. Livestreamed video showed Israeli forces forcing their way onboard before cutting communications.

The flotilla began its journey from Barcelona, Spain, on September 1. The convoy, which included sailboats and larger supply vessels, carried symbolic amounts of humanitarian aid and sought to establish a maritime corridor into Gaza.

Organizers said the mission was meant to focus international attention on the humanitarian crisis in the enclave, where famine and shortages have worsened during the nearly two-year war.

Mass Detentions

Israel has detained 497 activists from the flotilla since Wednesday. The Israeli Foreign Ministry confirmed that four Italian citizens had already been deported, while others would soon follow. “Israel is keen to end this procedure as quickly as possible,” the ministry said in a statement on X.

Among those detained are high-profile figures such as climate activist Greta Thunberg, former Barcelona mayor Ada Colau, Nelson Mandela’s grandson Mandla Mandela, and European Parliament member Rima Hassan. Organizers said people from 37 countries were on board, including 30 from Spain, 22 from Italy, 21 from Turkiye, and 12 from Malaysia.

Reporters Without Borders (RSF) confirmed that more than 20 foreign journalists were among those detained. “Arresting journalists and preventing them from doing their work is a serious violation of the right to inform and be informed,” said Martin Roux, head of RSF’s crisis desk. The Committee to Protect Journalists (CPJ) reported that 32 journalists had been accompanying the flotilla.

International Reaction

The interception has drawn strong global criticism. Colombia’s President Gustavo Petro announced his government would expel Israeli diplomats and suspend the country’s free trade agreement with Israel. “We will not tolerate the abduction of civilians in international waters,” Petro said.

Turkiye’s Foreign Ministry called the incident an “act of terrorism,” while South Africa’s President Cyril Ramaphosa demanded the release of South Africans detained on the boats. Demonstrations were held in cities including Rome, Istanbul, Athens, and Buenos Aires, with more planned. Italy’s largest trade union called a one-day general strike on Friday in protest.

European nations, including France, Germany, Spain, Greece, and Ireland, urged Israel to respect the rights of detainees and facilitate their safe deportation.

Stephen Cotton, secretary-general of the International Transport Workers’ Federation (ITF), which represents more than 16 million workers worldwide, said: “Attacking or seizing nonviolent, humanitarian vessels in international waters is illegal under international law. States cannot pick and choose when to respect international law. The seas must not be turned into a theatre of war.”

The United Nations has not formally commented, but Francesca Albanese, the UN’s special rapporteur for Palestine, described the interceptions as an “illegal abduction.”

Israeli Blockade

Israel imposed its naval blockade on Gaza in 2007 after Hamas took control of the territory. It says the measure is necessary to prevent weapons smuggling. Critics, however, argue that the blockade amounts to collective punishment of Gaza’s 2.3 million residents, restricting food, fuel, and humanitarian aid.

International activists have repeatedly challenged the blockade. In 2010, Israeli commandos raided the Mavi Marmara, part of a Turkish-led flotilla, killing nine activists. In 2008, one small boat succeeded in reaching Gaza, the last time an aid flotilla broke through.

The Sumud Flotilla is the largest effort to date in terms of the number of boats involved. Its organizers say their mission was peaceful, with participants including doctors, clergy, lawmakers, and civil society activists.

Drone Attacks and Harassment

Organizers accused Israel of targeting the flotilla with drones and signal jamming during its journey. Three incidents were reported: twice in Tunisian waters in early September, and once south of Greece last week, when “at least 13 explosions” were heard near several boats. No casualties were reported, but some vessels were damaged.

As the convoy neared Gaza late Wednesday, activists reported being shadowed by unlit naval boats and drones. Israeli forces then moved in, spraying boats with water cannons, flashing lights, and eventually boarding the vessels.

The flotilla’s voyage took place against the backdrop of Israel’s war in Gaza, now approaching its second year. The conflict began on October 7, 2023, when Hamas fighters attacked Israel, killing 1,200 people and taking 251 hostages. Israel’s military campaign has since devastated the enclave.

More than 66,000 Palestinians have been killed, about half of them women and children. UN agencies and aid organizations say famine has been declared in Gaza City and food shortages are widespread. Israel says its operations aim to pressure Hamas to release the 48 hostages it believes are still alive.

Global Implications

The seizure of the Sumud Flotilla highlights mounting international concern over Israel’s conduct of the war and its enforcement of the blockade. Activist groups argue the blockade violates international humanitarian law, while Israel insists it is a legal measure of self-defense.

The scale of this flotilla, the prominent figures involved, and the sweeping international response suggest that maritime challenges to the blockade may intensify. With several governments now reassessing relations with Israel, including trade agreements and diplomatic ties, the fallout from the flotilla’s interception is likely to extend beyond the Middle East.

For Gaza’s civilians, however, the interception means that no additional aid has arrived by sea. The convoy’s failure underscores the continuing difficulties of delivering relief to the enclave, where humanitarian agencies warn the crisis has reached unprecedented levels.