A fire tore through a refugee camp in northern Greece on Wednesday, threatening more than 2,300 people who live there.

More than one dozen tents were destroyed in the blaze.

Humanitarian organizations have criticized the conditions in Greek camps where many refugees and migrants have been stranded for months after trying to make their way into western Europe. 

Tens of thousands have been living in makeshift camps across the country since Balkan nations further along the route into Europe closed their borders.

Police said at least two people were taken to a hospital suffering from smoke inhalation.

Fire at Diavata refugee camp now. Friend inside says ppl died, still unconfirmed by authorities. #refugeesGR pic.twitter.com/gbqGGrlm3P

— P. Tania Karas (@taniakaras) April 20, 2016

Journalist Tania Karas shared footage sent to her from a refugee inside the camp on Wednesday that shows a dark cloud of smoke rising above the camp.

Terrifying vid inside #Diavata camp now. Wall prevented fire from spreading but many tents burning. #refugeesGR pic.twitter.com/a4iGgSCiTy

— P. Tania Karas (@taniakaras) April 20, 2016

The blaze started from a tent in the Diavata camp, near the northern city of Thessaloniki, and spread to others, leaving at least 13 dwellings burnt. 

Other videos shared from inside the camp show crowds of people running from the black, billowing smoke.

Big fire at Diavata camp!!! Need help😢@PROACTIVA_SERV @campsoscar @essamdaod pic.twitter.com/jEwl10dwGa

— Humanity Crew (@HumanityCrew) April 20, 2016

It was not immediately clear what sparked the fire, which firefighters extinguished. A protest by about 100 people in the camp followed, with half of them spilling out onto the road and attempting to block traffic.

Just over 2,300 refugees live in the camp. About 54,000 refugees and migrants are stranded in Greece after Europe closed its land borders to the massive refugee flow.

Additional information from the Associated Press.

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