By Kareem Khadder, Mohammed Tawfeeq, Abeer Salman, Helen Regan, Dana Karni and Catherine Nicholls

(CNN) — The detained crew of the Gaza-bound aid ship that was intercepted by Israel on Monday morning has been taken to the Israeli port of Ashdod, according to Israel’s foreign ministry.

Those on board the Madleen aid ship, including Sweden’s Greta Thunberg and other prominent activists, were undergoing medical examinations on Monday evening, the foreign ministry said.

The Freedom Flotilla Coalition (FFC) said the Israeli military had “attacked” and “unlawfully boarded” the Madleen, which was attempting to deliver aid to Gaza – where more than 600 days of war, and an 11-week Israeli blockade of all aid, has pushed the enclave’s 2.1 million people deeper into a hunger crisis.

Earlier on Monday, a source familiar with the matter told CNN that Israel planned to bring the detained activists to Ashdod port and then through a “quick deportation process” via Ben-Gurion Airport.

The ministry also previously posted a video showing members of the Madleen crew sitting side by side wearing orange life jackets while a solider offered them bottled water and plastic-wrapped sandwiches. Thunberg can be seen sitting near the front of the group.

The FFC had earlier said the ship had come “under assault in international waters” in a Telegram post.

“Quadcopters are surrounding the ship, spraying it with a white paint-like substance. Communications are jammed, and disturbing sounds are being played over the radio,” the FFC said. A video posted by Israel’s foreign ministry appeared to show a Navy staffer sending a radio message to the vessel saying the “maritime zone off the coast of Gaza was closed.”

In a video livestreamed from the boat, activist Yasemin Acar showed a white substance on the deck, saying it had been dropped on the vessel. Acar was later heard saying it was affecting her eyes.

The FFC group also posted a video on Telegram, showing members of the crew sitting inside the boat with their hands in the air.

After losing communication with the vessel, the FFC began posting pre-recorded video messages from Thunberg and others onboard. “If you see this video, we have been intercepted and kidnapped in international waters by the Israeli occupational forces, or forces that support Israel,” Thunberg said in her video.

In a statement, the FFC said Israel had acted with “total impunity” and that the vessel’s cargo, which included baby formula, food and medical supplies was “confiscated.” Israel said it would transfer the goods to Gaza through humanitarian channels.

“Israel has no legal authority to detain international volunteers aboard the Madleen,” said Huwaida Arraf, human rights attorney and Freedom Flotilla organizer. “This seizure blatantly violates international law and defies the (International Court of Justice’s) binding orders requiring unimpeded humanitarian access to Gaza.”

Amnesty International also condemned the detention of the activists.

“The operation of intercepting and blocking the Madleen in the middle of the night and in international waters violates international law and put the safety of those on the boat at risk,” Agnès Callamard, Amnesty International’s secretary general, said in a statement.

In a statement to CNN, Israel said that it “is preventing the entry of all vessels into the Gaza Strip, in accordance with international law.”

Israel had repeatedly vowed to stop the aid boat from reaching Gaza, and described the ship as a “selfie yacht” carrying “celebrities.”

“I have instructed the IDF to ensure that the ‘Madleen’ flotilla does not reach Gaza,” Israeli defense minister Israel Katz said on Sunday.

After the flotilla crew members were detained, Katz said in a post on X that he had instructed the military to screen videos of the Hamas attacks on Israel from October 7, 2023 to the activists upon their arrival at Ashdod Port.

Israel’s foreign ministry said the group “attempted to stage a media provocation whose sole purpose was to gain publicity.”

“There are ways to deliver aid to the Gaza Strip – they do not involve Instagram selfies,” it added.

In an earlier statement on Monday, the ministry said “unauthorized attempts to breach the blockade are dangerous, unlawful, and undermine ongoing humanitarian efforts.”

The French foreign ministry said on Monday that there were six French nationals on board the Madleen, and that it is in contact with Israeli authorities to bring them back. The French government had previously warned the activists against their plan “due to the risks involved,” a statement from the ministry added.

An Élysée source told CNN that France’s President Emmanuel Macron “has requested that arrangements be made, as quickly as possible, for the return” of its nationals.

The foreign ministry statement also called on the Israeli government to allow “immediate, large-scale, and unhindered access for humanitarian aid to Gaza.”

Hamas demanded the immediate release of the activists and condemned their detention in a statement, calling the interception “a flagrant violation of international law, and an attack on civilian volunteers acting out of humanitarian motives.”

As the Madleen was taken to Ashdod, some 15 activists protested the ship’s seizure in the city. The demonstrators carried signs reading, “resist genocide,” “release the Madleen activists now” and “stop state terror.”

“We… have come to express our support and solidarity with the Madleen as part of the Freedom Flotilla, whose activists were abducted by Israel,” one activist said in English. The demonstrators were interrupted by a passerby who shouted in Hebrew, “You’re living in Israel,” calling the protesters “bullies” and “hooligans.”

The Madleen is part of the Freedom Flotilla Coalition, an organization that has campaigned against Israel’s blockade of Gaza and tried to break the siege by boat.

The crew, which had publicized the location of the ship with an online tracker, began preparing for the possibility of interception by the Israeli military. On Monday morning, the UK-flagged civilian vessel was north of Egypt in the Mediterranean Sea, slowly approaching the coast of Gaza, but the tracker has since appeared to have stopped.

“We know that it’s a very risky mission and we know that previous experiences with flotillas like this have resulted in attacks, violence and even cases of death,” Thunberg told CNN on Saturday.

Israel imposed a full humanitarian blockade of Gaza on March 2, cutting off food, medical supplies, and other aid to the more than 2 million Palestinians who live in the territory for 11 weeks.

Faced with growing international pressure, Israel began allowing a trickle of aid in late May. But humanitarian organizations say it is only a fraction of the aid that entered the enclave before the war, and have warned of a worsening humanitarian crisis and the growing risk of widespread famine. A UN-backed report warned in late April that one in five people were facing starvation.

Dozens of Palestinians have been killed over the past week while on their way to try and obtain aid from a new US-backed group commissioned to deliver aid to Gaza, the Gaza Humanitarian Foundation (GHF). The group is intended to replace the UN-led system of distributing aid in Gaza. The United Nations has warned that the new distribution mechanism has become a “death trap” for desperate people seeking food in the strip.

Last month, another vessel from the Freedom Flotilla Coalition came under what its organizers claimed was an Israeli drone attack off the coast of Malta in international waters. The group did not provide evidence that the drone was Israeli, while the Israeli military has declined to comment on the alleged attack.

The ship, the Conscience, was heading to Malta, where a large contingent of activists, including Thunberg, were due to board before it departed for Gaza.

The later voyage on the Madleen, which was intercepted by Israel, departed from Sicily last Friday.

An earlier version of this article mistakenly stated Irish actor Liam Cunningham was onboard the Madleen. The FFC has confirmed he is not onboard.

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