Israel has threatened to block Greta Thunberg’s Freedom Flotilla from delivering aid to Gaza, it has emerged.

The climate change advocate, along with 11 other pro-Palestine supporters, embarked on a voyage to Gaza on Sunday afternoon in an effort to ‘break Israel’s blockade’ of the besieged area.

The sailboat Madleen, run by the activist organization Freedom Flotilla Coalition, set off from the port city of Catania in southern Italy. It carries what the campaigners refer to as a ‘symbolic’ amount of aid.

Clips shared on TikTok capture the young activists smiling, swimming, and creating social media content as they travel across the Mediterranean.

But the Israeli Army says it is ‘prepared’ to raid the ship, as it has done with previous Freedom Flotilla efforts.

‘For this case as well, we are prepared,’ IDF spokesman Brigadier General Effie Defrin said, The Times reports. ‘We have gained experience in recent years, and we will act accordingly.’

It is unclear if the Israeli military will strike, but an activist on board the Madleen has issued a ‘new alert’, claiming that the vessel is being followed by a drone, according to footage shared on social media.

A separate Freedom Flotilla ship was attacked in May by two alleged drones while sailing in international waters off the coast of Malta.

Israel has threatened to block Greta Thunberg’s Freedom Flotilla from delivering aid to Gaza . The young activist is seen on board the ship, flying the Palestinian flag

The sailing boat Madleen, operated by activist group Freedom Flotilla Coalition, is carrying what the campaigners described as a ‘symbolic’ amount of aid

The Israeli Army says it is ‘prepared’ to raid the Madleen ship, as it has done with previous Freedom Flotilla efforts. Pictured: Israeli Prime Minister Benjamin Netanyahu on May 21

The Madleen is trying to reach the shores of the Gaza Strip in an effort to bring in some aid and raise ‘international awareness’ over the ongoing humanitarian crisis, the activists ahead of Sunday’s departure.

‘We are doing this because, no matter what odds we are against, we have to keep trying,’ Thunberg said, bursting into tears during her speech.

‘Because the moment we stop trying is when we lose our humanity. And no matter how dangerous this mission is, it’s not even near as dangerous as the silence of the entire world in the face of the live-streamed genocide,’ she added.

Israel, which was founded in the aftermath of the Holocaust, has adamantly rejected genocide allegations against it as an anti-Semitic ‘blood libel’.

‘We are breaking the siege of Gaza by sea, but that’s part of a broader strategy of mobilizations that will also attempt to break the siege by land,’ echoed activist Thiago Avila.

Avila cited the upcoming Global March to Gaza – an international initiative also open to doctors, lawyers and media – which is set to leave Egypt and reach the Rafah crossing in mid-June to stage a protest there, asking Israel to stop the Gaza offensive and reopen the border.

The sailing boat Madleen, operated by activist group Freedom Flotilla Coalition, departed from the Sicilian port of Catania, in southern Italy and is carrying what the campaigners described as a ‘symbolic’ amount of aid

Greta Thunberg and crew stand aboard the aid ship Madleen, which left the Italian port of Catania on June 1 to travel to Gaza to deliver humanitarian aid

In mid-May, Israel slightly eased its blockade of Gaza after nearly three months, allowing a limited amount of humanitarian aid into the territory.

Experts have warned Gaza is at risk of famine if more aid is not brought in.

UN agencies and major aid groups say Israeli restrictions, the breakdown of law and order, and widespread looting make it extremely difficult to deliver aid to Gaza’s roughly 2 million Palestinians.

Among those joining the crew of the Madleen are Game of Thrones actor Liam Cunningham and Rima Hassan, a French member of the European Parliament who is of Palestinian descent.

Hassan has been barred from entering Israel due to her active opposition to the Israeli assault on Gaza.

The activists expect to take seven days to get to their destination, if they are not stopped.

Thunberg had been due to board a different Freedom Flotilla ship last month, but that attempt to reach Gaza by sea failed after another of the group’s vessels was attacked near Malta.

The group blamed Israel for the attack, which damaged the front section of the ship, in the latest confrontation over efforts to send assistance to the Palestinian territory devastated by nearly 19 months of war.

The Madleen departed from the Sicilian port of Catania on Sunday. The activists expect it will take seven days to get to their destination, if they are not stopped

The Israeli government says the ongoing blockade in Gaza is an attempt to pressure Hamas to release hostages it took during the Oct. 7, 2023, attack that triggered the conflict.

Hamas terrorists assaulted southern Israel that day, killing some 1,200 people, mostly civilians, and abducting 251. Hamas is still holding 58 hostages, 23 of whom are believed to be alive.

In response, Israel launched an offensive that has killed over 52,000 Palestinians, mostly women and children, according to Gaza’s Hamas-led Health Ministry, which does not distinguish between fighters and civilians. 

Israel’s bombardment and ground operations have destroyed vast areas of the territory and left most of its population homeless.

The Flotilla group was only the latest among a growing number of critics to accuse Israel of genocidal acts in its war in Gaza. Israel vehemently denies the allegations, saying its war is directed at Hamas, not Gaza’s civilians.