A boat carrying Swedish climate campaigner Greta Thunberg and other activists leaves the port of Barcelona on August 31, 2025

A boat carrying Swedish climate campaigner Greta Thunberg and other activists leaves the port of Barcelona on August 31, 2025

Fierce Mediterranean winds forced a Gaza-bound flotilla carrying humanitarian aid and hundreds of pro-Palestinian activists, including environmental campaigner Greta Thunberg, to return to Barcelona, organisers said on Monday.

Around 20 vessels left the Spanish city on Sunday aiming to "open a humanitarian corridor and end the ongoing genocide of the Palestinian people" amid the Israel-Hamas war, said the Global Sumud Flotilla -- sumud being the Arabic term for "resilience".

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