Israel’s navy intercepted at least 14 boats from the Global Sumud Flotilla, which was attempting to deliver humanitarian supplies to Gaza and challenge the long-standing naval blockade on the strip. Among those detained is Sinn Féin Senator Chris Andrews, who was aboard one of the vessels.
Organisers say the flotilla comprised over 40 boats carrying about 500 activists, parliamentarians, lawyers and humanitarians. Included among the passengers were Greta Thunberg and Nelson Mandela’s grandson, Mandla Mandela.
The intercepts reportedly took place around 70 nautical miles off the Gaza coast — well outside Israel’s 12-nautical-mile territorial waters, raising serious questions about the legality of the operation. According to flotilla organisers, communications were cut, water cannons were used, and bright lights were shone into cabin areas.
Some of the boats intercepted included the Spectre (Senator Andrews’ vessel), the Alma, Sirius, and Adara. In footage released by the Israeli Foreign Ministry, Greta Thunberg is seen seated calmly on deck while soldiers provide her with water and a jacket. The Israeli government maintains that the flotilla was entering a combat zone and violating its naval blockade, and has declared the mission provocative rather than humanitarian.
On social media, Israel’s foreign ministry said: “Several vessels … were safely stopped and their passengers are being transferred to an Israeli port. Greta and her friends are safe and healthy.” Israel also claims it offered the flotilla alternate, “safe channels” for delivering aid, but says the flotilla refused to use them.
Organisers of the flotilla strongly condemn the interception as illegal, a “war crime”, and an assault on unarmed humanitarians in international waters.
At least seven to nine Irish citizens are confirmed among those detained, including Senator Chris Andrews, Tara O’Grady, Louise Heaney, Sarah Clancy, Diarmuid Mac Dubhghlais, Thomas McCune and Catríona Graham. In total, 22 Irish activists are believed to have been part of this flotilla.
Sinn Féin has stated that the flotilla — and Senator Andrews’ vessel, Spectre — was violently assaulted, and that participants were “kidnapped by armed Israeli agents.” Irish political leaders and institutions have called for the immediate release of the detainees, and urged that international law be upheld.
Tánaiste Simon Harris said Ireland is in “close contact” with consular authorities, stressing that Ireland expects international law to be upheld and for those on board to be treated accordingly. President Michael D. Higgins condemned the interception and questioned the credibility of international commitments when a flotilla of more than 40 boats carrying water, medicine and food is blocked from entering Gaza.
Senator Andrews, who has participated in multiple previous flotillas, warned before departure that Israeli forces would likely use water cannons and board at night. He recalled that in a past flotilla his boat was water-cannoned and occupants were held at gunpoint, after which he was detained in Israel for a week before being deported.
This recent Global Sumud Flotilla is not the first time foreign activists — among them Greta Thunberg — have attempted to breach Israel’s blockade of Gaza. Earlier this year, in June 2025, an aid vessel called the Madleen was intercepted by Israeli naval forces.
The Madleen, flagged from the UK, carried about a dozen activists including Thunberg and French–Palestinian MEP Rima Hassan. Israeli forces intercepted it in international waters around 185 km off the Gaza coast, used drones to encircle it, jammed its communications, sprayed a white substance on the deck, and ordered the activists to discard phones before boarding. After the takeover, the vessel was towed to Ashdod port and the activists detained. Some agreed to voluntary deportation, while others (including Hassan) refused and remained in custody pending judicial proceedings.
Israel’s justification then mirrored its argument now: the blockade is in place for security, and it claimed the flotilla was a political stunt. Critics responded that the seizure was unlawful, akin to piracy, and that Israel was violating principles of freedom of navigation and humanitarian assistance. The incident drew legal scrutiny and public attention, but did not prevent the more ambitious flotilla mission now under way.
Legality & international law: Intercepting vessels in international waters is normally fraught with legal challenges. Israel contends it acts under the laws of armed conflict and blockade enforcement; critics argue this violates customary maritime law and human rights protections.
Humanitarian crisis in Gaza: The flotilla carries essential supplies — water, medicine, baby formula — intended to address the dire shortage facing Gaza’s civilian population under siege.
Global spotlight: With high-profile names such as Greta Thunberg and Irish senators aboard, world media attention is heightened. The interception has already triggered diplomatic protests from multiple countries and calls for investigations.
Irish public interest: With direct Irish citizens caught up, the issue becomes more immediate and politically charged at home. The Irish government is under pressure to act decisively to protect its citizens and uphold legal norms.
Precedent for future activism: The success or failure, and the legal arguments settled here, will influence how future flotillas and humanitarian efforts operate under heavy geopolitical conflict.
