Israeli naval forces intercepted 39 vessels from a Gaza-bound aid flotilla on Thursday, detaining dozens of activists — including international climate activist Greta Thunberg and several European lawmakers, The Associated Press reported.

The Global Sumud Flotilla, which set out across the Mediterranean with more than 40 boats carrying about 500 activists, was the largest yet to attempt to break Israel’s blockade of the enclave, according to the AP.

The flotilla has since been reduced to a single vessel still headed toward Gaza. Organizers with the Global Sumud Flotilla said on X that the boat was last tracked only a few miles off Gaza’s coast before contact was lost. Activists told the AP that they believed the flotilla’s size would make it harder for Israeli forces to intercept every vessel. 

Photos and surveillance footage captured the moment Israeli soldiers in helmets and night vision goggles boarded the flotilla. A photo from the Israeli foreign ministry showed Thunberg, the most prominent of the flotilla’s passengers, accompanied by soldiers following the interception. Israeli officials said those detained included Thunberg, former Barcelona mayor Ada Colau, and European Parliament member Rima Hassan, according to the AP.

Israeli forces stormed a Global Sumud Flotilla vessel on Oct. 2, 2025, as the boat attempted to sail toward Gaza. (Global Sumud Flotilla via AP)

News of the interception also drew condemnation and sparked demonstrations in cities including Rome, Naples, Istanbul, Athens and Buenos Aires, the AP said. Italy’s largest trade union announced a one-day general strike for Friday in protest, while more rallies were expected across the globe on Thursday, the outlet added.

Anti-Israel activists aboard the Global Sumud Flotilla, including climate activist Greta Thunberg, before the vessels were intercepted by Israeli forces. (Israeli Foreign Ministry)

The flotilla is part of a series of international efforts to challenge Israel’s blockade, which has been in place since 2007 after Hamas took control of Gaza. Previous attempts by activist flotillas to break the blockade have largely failed and sometimes sparked deadly clashes, including during the 2010 Gaza Freedom Flotilla raid.

Israel Defense Forces (IDF) and the Global Sumud Flotilla did not immediately respond to a request for comment from Fox News Digital.