Nine people have been arrested after a large fire destroyed parts of the Moria refugee camp on the Greek island of Lesbos. Up to 4,000 migrants were evacuated from the camp, as the blaze destroyed tents and prefabricated homes. No fatalities were reported, but large areas of the camp, which was already crowded, were left unusable. The Greek government said it would send a ship to hold at least 1,000 people as a temporary overflow area. Early reports suggested a riot broke out as rumours of imminent mass deportations to Turkey spread. Other witnesses said it was the result of an argument over food. The nine people arrested under suspicion of starting the blaze included people from Afghanistan, Iraq, Senegal, Syria and Cameroon, the AFP news agency reported, citing a police source. Additional riot police have been dispatched to the island.