* 226 migrants rescued off Libyan coast by German charity
* New populist govt says Italy won't welcome charity ships
* Italy sent 630 rescued migrants on to Spain this month (Recasts on transport minister comment, adds Seefuchs ship pulling out)
By Steve Scherer and Angelo Amante
ROME, June 21 (Reuters) - Italy appeared to relent on Thursday after at first refusing to accept 226 migrants on board a German charity rescue ship, saying later in the day it would take them in but would impound the vessel.
Anti-immigrant interior minister Matteo Salvini initially said the Dutch-flagged ship Lifeline should take the people it plucked from the Mediterranean to the Netherlands and not Italy.
But transport minister Danilo Toninelli, who oversees the coastguard, later said it was unsafe for the 32-metre vessel to travel such a great distance with so many people on board.
"We will assume the humanitarian generosity and responsibility to save these people and take them onto Italian coastguard ships," Toninelli said in a video posted on Facebook.
Earlier this month Salvini pledged to no longer let charity ships bring rescued migrants in Italy, leaving the Gibraltar-flagged Aquarius stranded at sea for days with more than 600 migrants until Spain offered them safe haven.
The Dutch government denied responsibility for the vessel, something Toninelli said Italy would investigate. The Italian coastguard would escort Lifeline "to an Italian port to conduct the probe" and impound the ship, he said.
Also on Thursday, the German charity Sea Eye which operates another Dutch-flagged ship, the Seefuchs, said in a statement it was ending its sea rescue mission after the Dutch government told them that it was no longer responsible for the vessel.
The crew of the ship operated by Mission Lifeline, a charity based in Dresden, Germany, had spotted migrants in two overcrowded rubber boats in international waters early on Thursday.
They were told by Italy that Libya's coastguard was coming to get them, but decided to rescue the migrants because they would not have been safe if taken back to Libya, a spokesman for the charity said.
"You have intentionally not listened to Italian or Libyan authorities. Good. Then take this load of human beings to the Netherlands," Salvini, leader of the anti-immigrant League party, said in a Facebook video.
International maritime guidelines say that people rescued at sea should be taken to the nearest "place of safety".
The United Nations and other humanitarian agencies do not deem Libya "a place of safety" because they say migrants there are subject to indefinite detention, physical abuse, forced labour and extortion.
Lifeline spokesman Axel Steier said the migrants on its boat included 14 women and four small children. "We didn't want to wait for the Libyan coastguard because people were in danger," Steier told Reuters.
Waiting for the Libyans would have constituted allowing "an illegal pushback" of refugees to a country where they are not safe, he added.
Italy's new populist government has thrust migration to the top of the European Union agenda. Italy has seen more than 640,000 migrants land on its shores since 2014 and is currently sheltering 170,000.
An emergency "mini-summit" has been called for Brussels on Sunday to discuss immigration ahead of a full, 28-state EU summit on June 28-29.
Last weekend, Toninelli had called on the Netherlands to recall the Lifeline and Seefuchs.
"They provide an incentive and encouragement for the departure of the death boats," Toninelli said on Thursday.
(Additional reporting by Anthony Deutsch in Amsterdam; Editing by Andrew Roche)
Our Standards: The Thomson Reuters Trust Principles.