Residents counted several missile strikes, one of which apparently hit a military camp of forces loyal to Tripoli in the Sabaa district in the south of the capital, scene of the heaviest fighting between the rival forces. The fighting has killed 220 people an wounded 1,066, the World Heath organization (WHO) said.
Mitiga airport was closed earlier in the day after residents reported an air strike on the Libyan capital.
Jalel Harchaoui, research fellow at the Clingendael Institute global relations think tank in The Hague, said the Trump phone call was tantamount to supporting Haftar's operation and thus is "creating an environment where a military intervention by foreign states, like Egypt, is likelier".
"Our airforce is providing fire support to troops on the ground", Ahmed al-Mesmari, spokesman for Haftar's forces said - while GNA forces confirmed carrying out seven air raids against LNA positions on Saturday.
Some witnesses spoke of air raids and drones, but Mejii said the blasts were caused by strikes from LNA helicopters aimed at "terrorising civilians".
Over 200 people have been killed in Tripoli in the last two weeks since renegade Libyan military commander Khalifa Haftar's troops launched a strike to oust United Nations -backed Prime Minister Fayez al-Sarraj.
On Thursday, both the United States and Russian Federation said they could not support a U.N. Security Council resolution calling for a ceasefire in Libya at this time.
On Friday, the White House provided a summary of the phone conversation between Trump and the renegade Libyan general.
That conference was hastily cancelled by the UN's representative to Libya Ghassan Salame, who just this week described Mr Haftar's military operation as a "coup d'etat".
"The powers that support terrorism in Libya are France, Russia, Egypt, Saudi Arabia and the UAE", said Abdelrizaq Musherib, a protester. "We want civilian rule and freedom".
However, the French embassy in Libya on Friday tweeted in Arabic that Paris was "opposed to the attack" on Tripoli and urged all parties to abide by a ceasefire and engage in peace negotiations. The foreign ministers of France and Italy also said they are trying to forge a common strategy on Libya.