Greece’s largest migrant camp on the island of Lesbos was gutted by a huge fire early Wednesday, forcing hundreds of refugees and asylum seekers to flee, AFP reported.

The fire was reportedly started by migrants who were revolting against the coronavirus isolation rules. Though the camp is mostly destroyed, no casualties have been reported yet. 

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The government has ordered an investigation into the case and has declared an emergency across the island. “There are 35 positive cases and they need to be isolated to prevent an outbreak among the local population,” a spokesperson Stelios Petsas said. 

Many of the refugees, who were housed in the camp, have now taken shelter in the hills surrounding it. “The whole camp is on fire. Everything is burning. People are escaping. Their homes in Moria are gone,” said Refugee support group Stand by Me Lesvos.

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Earlier, the UN refugee agency had urged Greece to reduce congestion in its migrant camps. The Moria camp, which was built to hold fewer than 2,800 people, had been routinely criticised for its lack of hygiene and overcrowding.

Many refugees have been unable to find lodgings and jobs after leaving the camps, with housing and cash benefits recently scaled back by the government.