The government has also transferred a number of wounded to Tunisia, Turkey, Italy and Ukraine for medical treatment, said Tarek Al Hamshiri, the head of the government forces' Field Medical Centre.
With more than 560 people wounded since the fighting started on April 4, the WHO said it was sending more medical supplies and staff to Tripoli.
Libya’s Government of National Accord has protested at what it said were “untruths” in UN envoy Ghassan Salame’s latest report on the conflict in the North African country.
Forces loyal to Libyan strongman Khalifa Haftar said they launched air strikes early on Tuesday against an airbase in third city Misrata held by government loyalists.
The IOM estimates that there remain more than 60,000 Nigerians in Libya among roughly 600,000 migrants from 39 nations, most of them with no legal documents, held in camps, prisons, private houses or brothels.
The eastern Libyan National Army force (LNA) forces loyal to Khalifa Haftar confirmed a strike late on Sunday on the town, but denied they had targeted any civilians.
Flights have resumed from the Libyan capital’s sole functioning airport as calm returned on Monday to the outskirts of Tripoli after a temporary truce was violated the previous day.
Italian Prime Minister Giuseppe Conte’s announcement that six European Union (EU) countries had agreed to take in some 150 migrants from a rescue ship that Italy had blocked from docking is a welcome development that has helped resolve the latest standoff over immigration to Europe across the Mediterranean.