Fire swept through Greece’s largest refugee camp, which had been placed under COVID-19 lockdown, leaving more than 12,000 migrants in emergency need of shelter on the island of Lesbos on Wednesday, The Associated Press reported.

Overnight, the migrants at Moria refugee camp fled fires that broke out at multiple points and gutted much of the camp and surrounding hillside olive groves.

“It has been a very difficult night,” government spokesman Stelios Petsas said, adding that a state of emergency would be declared later Wednesday on the island.

Some 12,500 people were living at the Moria camp and the surrounding area, where additional restrictions have been imposed over the past week after a Somali man who had returned to the camp after being granted refugee status tested positive for the coronavirus.

There were no reports of injuries.

The fires broke out overnight, and police and fire officials on the island told The Associated Press, adding the cause of the blazes, as well as the full extent of the damage, remained unclear.