"Over 5,000 are presumed dead, with a total of 3,922 deaths having been registered in hospitals, according to WHO sources," the UN agency said, adding that rescue teams continue their search for survivors.
"The restoration of some roads, which had previously been blocked, is now allowing some individuals affected by the floods to leave the areas hit by Storm Daniel in search of safety, shelter and basic necessities," IOM added.
At least 6,000 people were killed and thousands of others remain missing due to the weekend floods in eastern Libya, according to latest official numbers.
On Monday, the International Federation of Red Cross and Red Crescent put the figure of missing people at 10,000.
Torrential rains from Storm Daniel swept several areas on Sunday in eastern Libya, most notably Benghazi, Al-Bayda and Al-Marj, as well as Soussa and Derna.
