The ship, with 123 unaccompanied minors, 11 other children and seven pregnant women aboard, is waiting in worldwide waters between Italy and Malta, which has also refused to take them in.
MSF called for a swift end to the crisis and a safe port in which to disembark the migrants.
Salvini's comments came after another spat with Malta following its reported refusal to come to the aid of another rescue ship Seefuchs, which was stranded with 126 migrants on board due to violent seas until it was allowed to dock in the Sicilian port of Pozzallo on Saturday.
The migrants were picked up off the Libyan coast at the weekend and were packed onto the Aquarius which is operated by the charities SOS Mediterranee and Medecins san Frontieres.
The statement addresses "It is our obligation to help to avoid a humanitarian catastrophe and to offer a safe port to these people".
Maltese premier Joseph Muscat accused Italy of violating global norms governing sea rescues and said its stance risked "creating a unsafe situation for all those involved".
Fresh water and food were running low aboard the vessel by Monday afternoon and fresh supplies had to be brought from Italy and Malta. "This is a European issue".
Local media have been suggesting that by instructing Acquarius to stand by its current position in deep waters, new Italian Interior Minister Matteo Salvini, who had been criticising NGOs for carrying out the role of taxis for migrants, has started implementing anti-migrant policies.
The ship said it had been ordered by Italy's coast guard coordination center late Sunday to remain 35 miles off Italy and 27 miles from Malta.
Italy's Prime Minister Giuseppe Conte said his country had "asked for a gesture of solidarity from Europe and this gesture has been made".
Medicins Sans Frontiers said: "This plan would mean to people already exhausted to spend four more days on the sea".
Migrants aboard SOS Mediterranee's Aquarius ship after being rescued in the Mediterranean Sea, in a photo released by by French NGO "SOS Mediterranee", on June 11, 2018.
"Starting today, Italy, too, begins to say NO to the trafficking of human beings, NO to the business of clandestine immigration", Salvini tweeted Sunday.
The Aquarius said it had received no instructions yet to head to Spain.
The regional leader of Spain's Basque Country, Inigo Urkullu, said the region was prepared to take care of 10 percent of the passengers.
"Turning this into a political weapon is despicable.it is clear that Europe must act more wisely, but we can not let these people die at sea".
While Spain's announcement demonstrates humanitarian and moral leadership, the Italian government's actions are a clear reminder of the ways in which political hostility towards refugees and migrants puts lives at risk.
European Union law requires asylum seekers to register in the first safe country they reach, but frontline countries such as Italy and Malta say the burden needs to be shared out across the bloc.
"If anyone thinks I won't move a muscle while we have another summer of landings, landings and more landings, well that's not what I'm going to do", Salvini told reporters.
May pleaded with fellow leaders to step back from the brink of a damaging trade war at a session of the summit on Friday night. German Chancellor Angela Merkel sat between Macron and Trump on a sofa, while Trudeau sat to the left of the US president.
Umtiti knocked back the claim that the negotiations over his new contract stalled because he was angling for more money, too. Umtiti added: "I'm nervous today because this is a dream that continues". "I just couldn't leave".
At her house in Khan Younis, Najar's mother collapsed in grief as she was handed her daughter's blood-stained uniform. The Israeli military said Palestinian militants had attacked its troops along the border with gunfire and a grenade.
Despite the best efforts of parishioners and bystanders, the pastor was bitten on his legs, back and arms and could not be saved. However, they used fishing nets to prevent the crocodile from taking the pastor's body into the lake, the police added.
The Cupertino-based firm, at its upcoming WWDC 2018 , is said to launch a new feature that aims to make this rumour a reality. WWDC is Apple's annual event where third party developers get a peek at Apple's software roadmap for the coming year.
A Sears Hometown store still is in operation on Avenue of the Cities in Moline, but the SouthPark Mall location closed in 2013. The results from the year-ago quarter included a $492 million benefit related to the sale of Craftsman .
If you'll recall, last month ZTE was handed an export ban as the result of not following the terms of a court case years ago. The Chinese Commerce Ministry said Thursday that some progress was made in talks that ended last weekend.
If the film collects Rs 280 crore more then it will secure a position on the list of 2018's commercial hit films. Yesterday, the Karnataka High Court had asked the state to provide security to the theatres screening the film.
This marks Trump's second summit of the G7, an informal gathering that meets every year under a rotating chairmanship. President Donald Trump arrives for the G7 Summit , Friday, June 8, 2018, in Canadian Forces Base Bagotville, Canada.
Mr Browder was in Madrid to give evidence to a Spanish prosecutor about money from the Magnitsky case that was moved to Spain. However, in a statement Interpol denied ever having an arrest warrant out for Browder.
Xiaomi's latest software boasts new AI camera features, as well as a redesigned recent app interface that maximizes screen space. While the Mi 8 Explorer Edition has the latest Snapdragon 845 SoC, the Vivo X21 is powered by the Snapdragon 660 SoC.
Baffert off to 2-for-2 start at Belmont Park
They let it go too easy". "I don't see how ( Restoring Hope ) got in anyone's way", the jockey told CNN Sport's Don Riddell. Justify became the greatest USbased racehorse in our era when completing an undefeated Triple Crown run on Saturday.
U.S. company to show Premier League matches
Amazon has not announced how much it has paid for its three-year deal to show 20 games a year from the start of the 2019 season. BT has bought 52 games a season, Premier Sports 53 games, including a match at 3pm on Saturdays, and Sky 128 games.
David Koch Steps Down From Company, Political Groups
He earned two degrees in chemical engineering from the Massachusetts Institute of Technology in the early 1960s. They have, however, distanced themselves from and disagreed with President Trump on a variety of issues.
Facebook made some private posts public for as many as 14M
A Facebook booth is seen at the China International Big Data Industry Expo in Guiyang, Guizhou province, China, on May 27, 2018. Facebook says the issue has now been fixed and that the user's privacy settings have been returned to their original state.
Sharapova dumped out by clinical Muguruza
The Romanian broke at the start of the second set and then held for 6-3 as Kerber dropped her serve again in the ninth game. Muguruza essentially got that round off, too: Her opponent, Lesia Tsurenko , retired with an injury after only two games.
Warner Bros. Set to Reveal New Hitman Content
A new Hitman sequel is set to be revealed later this week, but its publisher has already stealth killed any chance of a surprise. Our guess is that Warner Bros will simply handle the distribution of the game and IO Interactive will retain the game's rights.
Gmail Redesign to Roll Out to All in July
New Gmail is now available in an "Early Adopter Program" ( EAP ) with an option to try it out before the GA. Meanwhile, those who have already transitioned to the new Gmail will no longer be able to opt out.
Match point down? What’s for lunch, muses Zverev
The 30-year-old Romanian, who had never won a Grand Slam match before this week, will now face US Open runner-up Madison Keys. He was two points from the match but Dimitrov won back to back points to extend the match.
Facebook to swap ‘trending’ topics for breaking news
But only two days after the company stopped using humans to curate the list, a fake news item made its way into the section. Google offers a whole suite of products around tracking trends, and Twitter offers trends, even down to a local level.