The Moria refugee camp on the Greek island of Lesbos was still smouldering and in smoke on Wednesday, after fires broke out earlier in the morning.
People can be seen walking on roads without any signs of protection, while helicopters buzzed overhead dropping water on the camp.
There were no immediate reports of casualties. According to first reports, the whole camp fell prey to the flames.
The camp was placed under quarantine last week after the first COVID-19 case appeared at the overcrowded camp.
A 40-year-old Somalian man tested positive after having returned to the island after not being able to settle on the Greek mainland and was put in isolation to curb the outbreak.
The Moria camp is the largest in Europe, exceeding almost four times its maximum capacity of 3,100 people, hosting around 13,000 migrants living in poor sanitary conditions.