The Anti-Gaza War Freedom Fluid Union (FFC) has boarded a boat where Israeli forces are trying to bring food aid to the Gaza Strip by sea, the BBC reported.
It said that the handler vessel was intercepted in international waters.
Video footage is said to have raised their hands and shown the activists on board as several armed soldiers took control of the ship.
Israeli Foreign Ministry claimed that the navy stopped “into the maritime zone on the coast of Gaza” and broke the blockade there.
Meanwhile, the FFC said that the crew of 19 activists and two journalist handlers from various countries, including Australia, France, the UK and the US, were “invited” by Israeli soldiers.
The group also posted numerous videos urging people around the world to pressure their respective governments to “sanction” Israel.
The boat was carrying a baby formula to Gaza, one FFC activist said in a social media post.
In June, the yacht carrying 12 activists, including Sweden’s Greta Samberg, was intercepted by Israeli forces about 185km (115 miles) west of Gaza.
The expedition, also organized by the FFC, aimed to deliver aid to Gaza against Israeli lockdown and highlight the humanitarian crisis there.
At the time, Israeli Foreign Ministry claimed it was a “selfie yacht” carrying “less than a single truck aid.”
Israel stopped deliveries of humanitarian aid and commercial goods in Gaza on March 2, and resumed military attacks two weeks later, causing a two-month ceasefire to collapse with Hamas.
Israel has since prioritized the distribution of aid through the Gaza Humanitarian Foundation, supported by the US.
The United Nations and other aid groups have said they have refused to cooperate with the new system and are violating humanitarian principles of neutrality, equity and independence.