The country’s navy is reportedly preparing to rebuff the ship and, if necessary, arrest its passengers. The group is carrying supplies for Gazan Palestinians and protesting what they say is “Israel’s “illegal,

Thunberg said she joined the Madleen crew to "challenge Israel's illegal siege and escalating war crimes" in Gaza and highlight the urgent need for humanitarian aid.

Defence Minister Israel Katz said on Sunday that Israel wouldn't allow anyone to break its naval blockade of the Palestinian territory, which he said was aimed at preventing Hamas from importing arms.