The devices had gone off in the Ain Zara and Wadi Rabi districts on the southern edges of the capital, which had been controlled by militants backing warlord Khalifa Haftar until May, the health ministry said.
Libya's UN-backed government launched Operation Peace Storm in March to counter attacks on the capital and recently regained strategic locations in a major blow to warlord Haftar's militia.
The Libyan army had earlier officially announced the launch of the operation to liberate the airport, located south of the country's capital Tripoli.
Local officials said the Russian fighters allied to the warlord Khalifa Haftar retreated with their heavy equipment from the capital to the airport of Bani Walid, a town some 150 km southeast of Tripoli.
With no end in sight for the humanitarian crisis, NATO’s intervention may prove the only solution in finding peace and in halting other countries’ interference
Adding to the misery of residents of Libya's capital, the main water supplier to the northwest region said armed men in the south had stormed one of its facilities, reducing supply.
The recent attack came hours after rockets also fell on the Zawiyat al Dahmani neighbourhood, which is home to Libya's foreign ministry and the Italian and Turkish embassies in capital Tripoli.
Russia’s Wagner Group, one of the most controversial groups among mercenaries, used nerve agent against Libya’s Government of National Accord (GNA) forces in Salah al Din area in southern Tripoli, Libya's interior minister Fathi Bashagha said.
Haftar’s positions targeted after militias carried out attacks on civilian settlements using rockets that killed five and injured 18.
Local media says the attack took place in the government-held town of Shakshuk in western Libya, 150 km south of Tripoli.
Libya's UN-recognised government forces seized control of a strategic town and city near the capital Tripoli from militias loyal to warlord Khalifa Haftar.
The prospect of a Turkish troop deployment in Libya could prompt Russia to balance its interests and steer clear of warlord Khalifa Haftar.
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