LESBOS, Greece—Greece's prime minister demanded Sunday that the European Union take a greater responsibility for managing migration into the bloc, as Greek authorities promised that 12,000 migrants and asylum-seekers left homeless after fire gutted an overcrowded camp would be moved shortly to a new tent city.
Greek Prime Minister Kyriakos Mitsotakis blamed some residents at the Moria camp on the Greek island of Lesbos for trying to blackmail his government by deliberately setting the fires that destroyed the camp last week. But he said this could be an opportunity to improve how the EU handles a key challenge.

"It (the burning of Moria) was a tragedy. These images were bad. It was a warning bell to all to become sensitized. Europe cannot afford a second failure on the migration issue," Mitsotakis said Sunday at a press conference in the northern city of Thessaloniki.
The Moria refugee camp was built to house 2,750 people, but was filled with some 12,500 people who came across the sea from Turkey.

Since the fires, which came after the camp faced a coronavirus lockdown, thousands of people have camped out in the open on highway near Moria under police guard.
Mitsotakis said he has been in touch with French President Emmanuel Macron and German Chancellor Angela Merkel over the reallocation of at least some migrants from Moria, but he said there will be a new, permanent refugee camp on Lesbos.

The Greek army has been setting up tents at a former artillery range, about 4 kilometers (2.5 miles) from the old camp.
Migration Minister Notis Mitarakis said an estimated 1,000 Moria residents would be relocated to the army-built tent city late Sunday and that getting everyone housed at the new site would take several days.
"At the moment, it's happening on a voluntary basis," Mitarakis told Greek TV station Open TV.
Mitarakis said those entering the new camp would undergo rapid testing for coronavirus and that five new cases have been found so far.