BENGHAZI, Libya (Reuters) - Libyan security forces captured a second town from 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.

A general view of a factory destroyed in an air attack in Ben Jawad February 2, 2015. REUTERS/Hani Amara

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 Muammar Gaddafi’s fall in 2011, with Islamist militants taking root in the security vacuum.

PFG forces have advanced since separate brigades aligned with the unity government pushed Islamic State back to the outskirts of Sirte from the west.

Western states are counting on the unity government to bring together Libya’s armed factions and tackle Islamic State, which has exploited anarchy in the oil-producing North African state to establish its strongest base outside Syria and Iraq.

But the new government faces a tough task integrating Libya’s complex web of armed groups, and has failed to win support from key political and military factions in the east.

On Tuesday it announced an operations room to run the campaign against Islamic State on the coastal stretch between the eastern town of Ajdabiya and Sirte, which includes the PFG-controlled oil terminals of Es Sider and Ras Lanuf. It did not say which forces would be under its command.

Islamic State extended its presence along some 250 km (155 miles) of Mediterranean coast on either side of Sirte, and in January attacked Es Sider and Ras Lanuf.

Islamic State has lost no significant population centers in its coastal zone over the last week but if government-backed brigades hold their ground, the jihadists’ buffer zone around Sirte would have shrunk significantly.

The PFG is a thousands-strong paramilitary force set up to protect Libya’s oil installations.