The confusion over who launched the two fighter jets shows the chaos still engulfing Libya after the 2011 civil war that toppled down longtime dictator Moammar Gadhafi.
In a statement, the government demanded the chief of staff and military intelligence to investigate the predawn strikes today morning targeting positions of militias originally from the coastal city of Misrata and its Islamist allies.
The strikes, under the cover of darkness, sparked fears that a foreign country like Italy carried out the attack, as the Libyan military does not have aircraft that can fly at night, according to a former colonel in the Libyan air force.
Italy's ambassador to Libya even went on local television to say his country was not involved.
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Ahmed Hadiya, the spokesman for Libya Shield, an umbrella group for militias, suggested that the warplanes took off from the Wittiya air base west of Tripoli and targeted a base taken over by his militias recently. He did not provide more details.
A militiaman from the coastal city of Misrata said the jets belong to forces allied to renegade Gen. Khalifa Hifter. The militiaman spoke on condition of anonymity because he is not authorized to talk to journalists.
In Tripoli, fighting since June concentrated around its international airport, controlled since 2011 by militias affiliated to the mountain town of Zintan. Its opponents, a mixture of Mistara militias and Islamists, launched a surprise attack on the airport aiming to drive them out.
For six hours today, Egypt cancelled all flights to Libya, saying Libyan authorities had closed the country's airspace.