Tuesday's fire was caused by an electrical malfunction. This is the second fire that erupts at a camp for the displaced since Sunday.
But the government says the number of Syrian refugees in Lebanon is closer to 1.5 million.
At least one person is reported to have died after a huge fire broke out at a camp for Syrian refugees in eastern Lebanon.More news: French president Macron to remove emergency security rule 'this autumn'
The blaze destroyed around 100 tents, and emergency workers said that the fire had turned the camp into "ashes", with only the bathrooms at the edge of the settlement left standing.
Around 20 of the tents were destroyed, it said.
The fire comes two days after Lebanese authorities rounded up almost 400 Syrian refugees following an attack on military troops conducting raids in refugee camps in Arsal, another town near the border with Syria. The Lebanese civil defense has put out the fire and Lebanese Red Cross has transported the victims to nearby hospitals.More news: Merkel to meet Trump on evening before G20
"Apparently it started with a cooking stove. As soon as the assessment is done, we will provide the families with all the help they need", she said.
Two people are in a critical condition, the UN's refugee agency said.
More than one million registered Syrian refugees live in Lebanon, largely in settlements in Bekaa, near the countries' border.More news: Australians' Medicare details up for sale on darknet
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