Libyan security forces captured a second town in as many days from Islamic State, a spokesman said, pushing the militant group back toward its stronghold of Sirte and away from positions near major oil terminals.

The Petroleum Facilities Guard took control of Nawfiliyah, about 130 km (80 miles) from Sirte, though fighting outside the town raged on and some PFG members had been wounded, spokesman Ali al-Hassi said. The PFG captured the nearby town of Ben Jawad on Monday after clashes that killed five of its combatants.

PFG forces say they are fighting on behalf of a U.N.-backed unity government that arrived in Tripoli in March to try to end factional chaos prevailing since Moammar Gadhafi's fall in 2011, with Islamist militants taking root in the security vacuum.