The Freedom Alliance of the Pro-Palestine Group (FFC) said Israeli forces have boarded a ship trying to bring food aid to the Gaza Strip.
It said Handara ship was intercepted in international waters.
Video footage allegedly showed militants on board lifting their hands as several armed soldiers controlled the ship.
The Israeli Foreign Ministry said the country’s navy stopped ships “illegal entry into the maritime zone on the coast of Gaza” and broke the blockade there.
It added that the ship “has safely to the coast of Israel” and that “all passengers are safe”.
“An attempt to violate the lockdown without authorization is dangerous, illegal and attempt to undermine ongoing humanitarian efforts”, the Ministry said in a statement about X.
It provides no details on where the ship is intercepting.
Meanwhile, the FFC said 19 activists and two journalists from Handala, including Australia, France, the United Kingdom and the United States, were “kidnapping” by Israeli soldiers.
The group has also released many videos urging people around the world to put pressure on their respective governments to “sanction” Israel.
One of the FFC activists said in an article on social media that the ship is bringing baby cheese recipe to Gaza.
In June, a yacht with 12 militants on board a ship – including Sweden’s Greta Thunberg – intercepted the Israeli military about 185 kilometers (115 miles) west of Gaza.
The expedition was also organized by the FFC to provide assistance to Gaza in order to violate Israel’s blockade and highlight the humanitarian crisis there.
At that time, the Israeli Foreign Ministry dismissed it as a “self-portrait yacht” and “less than one aid truck.” It added that aid transported on the FFC ship, including infant formula and medicine, would be transferred to Gaza “through real humanitarian channels.”
One year after winning legislative elections, Israel and Egypt removed their rivals from seizing control of Gaza in 2007 and began a blockade of Gaza.
Israel stopped delivering all humanitarian aid and commercial supplies on March 2 and resumed its military offensive two weeks later, a two-month ceasefire with Hamas collapsed.
Since then, Israel has prioritized aid allocation through the Gaza Humanitarian Foundation, which is supported with the United States.
The United Nations and other aid organizations have refused to work with the new system, saying it violates humanitarian principles of neutrality, impartiality and independence.
On Sunday, the Israeli military said it had imposed humanitarian aid on Gaza following international pressure and an increasingly severe hunger crisis in the Palestinian territory.
Later, the IDF said it would open a humanitarian corridor for aid convoys in Gaza to allow the United Nations and other organizations to provide food and medicine to Palestinians throughout the strip. The route will be from 06:00 to 23:00 local time (04:00 BST to 21:00 BST).
The IDF also announced the “humanitarian purpose” in three regions (Al Mawasi, Deir Al-Balah and Gaza City) from 10:00 to 20:00 local time (08:00 BST to 18:00 BST daily) until further notice.
Israel launched a military campaign in Gaza on October 7, 2023 to deal with Israel’s cross-border attacks, with about 1,200 people killed and another 251 people taken hostage.
At least 59,676 people have been killed in Gaza since then, according to the Hamas Ministry of Health in the region.
