Thousands of asylum-seekers have spent a fourth night sleeping in the open on the Greek island of Lesbos, after successive fires destroyed a notoriously overcrowded migrant and refugee camp during a coronavirus lockdown. Officials have said the Tuesday and Wednesday night blazes were deliberately set by some camp residents angered at quarantine and isolation orders imposed after 35 people in the Moria camp tested positive for COVID-19. With the camp gutted, Saturday morning found men, women and children sleeping under improvised shelters made of reed stalks, blankets and salvaged tents.