Libyan officials say troops loyal to the internationally recognised parliament have repelled an attack on two key oil terminals.
They said today's attackers briefly seized the Ras Lanuf and al-Sidra terminals before they were driven away by aircraft-backed troops loyal to Khalifa Hifter, a powerful general promoted by the parliament to field-marshal last week.
Brig Gen Ali Omar said the attackers were linked to Ibrahim Jedran, leader of the militia that had controlled the terminals before Hifter's forces took them last week.
Omar says many of the attackers were killed and that four troops were killed and six injured while defending the facilities.
Libya drifted into chaos following the 2011 uprising that toppled and killed dictator Moammar Gadhafi, and today is split between rival parliaments and governments.