JERUSALEM — Israeli forces stopped a Gaza-bound aid boat and detained Greta Thunberg and other activists who were on board early Monday, enforcing a long-standing blockade of the Palestinian territory that has been tightened during the war with Hamas.

The activists had set out to protest Israel’s ongoing military campaign in the Gaza Strip and its restrictions on the entry of humanitarian aid.

The Freedom Flotilla Coalition, which had organized the voyage, said the activists were “kidnapped by Israeli forces” while trying to deliver desperately needed aid to the territory.

“The ship was unlawfully boarded, its unarmed civilian crew abducted and its life-saving cargo — including baby formula, food and medical supplies — confiscated,” it said in a statement.

Israel’s Foreign Ministry cast the voyage as a public relations stunt, saying in a post on X that “the ‘selfie yacht’ of the ‘celebrities’ is safely making its way to the shores of Israel.”

It said the passengers would return to their home countries and the aid would be delivered through established channels.

— The Associated Press