As the war continues in Libya's second largest city, Benghazi, at least 130 have been killed in the past 10 days. Heavy fighting flared on Sunday between Libya's army and Islamist militias.
The army special forces have allied themselves with troops of former Gaddafi-era general Khalifa Haftar who has declared war on Islamists in Libya.
Libya is descending into anarchy as former rebels who helped topple Muammar Gaddafi in a NATO-backed uprising in 2011 have turned their guns on each other as they seek to set the country's political agenda and control its vast oil reserves.
Tripoli residents heard jets followed by explosions at dawn but more details on the latest fighting in Libya were not immediately available.
An Islamist and jihadist alliance announced the capture of the main military base in Benghazi, Libya in a statement which was confirmed by an army official.
"We remind America, if they intervene, of their defeats in Afghanistan, Iraq and Somalia, because they would face in Libya something much worse," he said in a statement.