Updated 1.47pm
Italian authorities on Monday seized the charity rescue vessel Eleonore with around 100 migrants aboard, who are to disembark after the ship entered Italian territorial waters despite a ban.
"The Eleonore will soon arrive at Pozzallo," Sicily, tweeted German charity Lifeline which operates the vessel.
The ship has been at sea for eight days waiting for a safe port to dock after rescuing around 100 migrants in distress while crossing the Mediterranean.
Three charity vessels are currently banned from entering Italian territorial waters in accordance with the hardline politics of the outgoing League-Five Star Movement coalition government.
Italy customs officers seized the Eleonore as part of the draconian legislation after it sailed into Italian waters on Monday.
The ship's captain Claus-Pieter Reisch said he headed for Italy as "the situation on board is life-threatening" because of heavy rain overnight and stormy seas.
Mr Reisch was subject to a Maltese court case earlier this year after Malta investigated a Dutch-flagged rescue ship, the Lifeline, run by the same German charity, after it docked more than 230 migrants.
He was accused by Italy and Malta of breaking the law by refusing to comply with Libyan authorities, and was handed a hefty fine for incorrect registration of the ship.
He is appealing the ruling.
Another rescue vessel, the Mare Jonio, with 31 rescued migrants on board was on Monday holding its position in international waters off Italy's southern Lampedusa island awaiting a safe port, Luca Faenzi spokesman told AFP.
The Mare Jonio rescued 98 people in distress off Libya last week, with 67 vulnerable people disembarked to Italy, including women, children and urgent medical cases, Faenzi said.
A third vessel, the Alan Kurdi operated by German charity Sea Eye, was on Monday sailing between Malta and Italy after also being banned from Italian waters by outgoing far-right interior minister Matteo Salvini.
Salvini, who is being removed from the government after he tried to bring it down, issued a tough security decree earlier this year which fines rescue vessels a million euros and provides for them to be seized and their captains prosecuted if they enter Italian waters without authorisation.
Prime Minister Giuseppe Conte is in talks to form a new government without Salvini.