Rebels defended their positions Monday in key western towns in the face of an offensive by Libyan leader Moammar Gadhafi's troops, holding on to strategic Bir Ghanam but suffering casualties in Zliten.

The rebels admitted they were running low on ammunition as they struggled to hold off an assault by loyalist forces in the town of
Zliten , some 120 kilometers east of the capital Tripoli .

Abdul Wahab Melitan, a rebel spokesman in the port city of
Misrata near Zliten, said forces loyal to strongman Gadhafi had on Sunday launched an assault on their positions in the Souk Telat area, killing three and wounding 15.

"The rebels lack ammunition to advance and we do not want to risk losing any ground," Melitan said.

The rebels on Tuesday punched into the centre of Zliten, sparking fierce clashes but later pulled back to the edge of the city.

NATO in
Brussels said alliance warplanes hit eight targets in the Zliten area on Sunday--four command and control nodes, one military facility, a weapons dump, an anti-tank weapon and a multiple rocket launcher.

The alliance also hit four targets in the area of the eastern oil hub of Brega, including two tanks, and five targets in
Tripoli --four of them anti-aircraft systems.

In the capital, Prime Minister Baghdadi Mahmudi told reporters that government troops had recaptured the strategic town of
Bir Ghanam to the southwest.

"Life is back to normal in Bir Ghanam, and today it is under the full control of the regime," he said.

But rebels controlled the town early on Monday, an AFP journalist said.

"The rebels are controlling the checkpoints. There are no shots," the journalist said, adding that NATO warplanes were overhead.

Rebels from the Berber-dominated Nafusa mountains south of
Tripoli claimed the capture of Bir Ghanam just 80 kilometers from the capital on Saturday, as they pushed further east.

The rebels have been using the Nafusa as a springboard to advance on
Tripoli but have encountered strong resistance.

Mahmudi also condemned the intensification of NATO raids on
Tripoli and other cities, claiming that the alliance no longer "differentiates between civilian and military sites."

Mahmudi criticized the National Transitional Council (NTC), the rebels' de facto government, and the security situation in the rebel-controlled east, especially after last month's assassination of General Abdel Fatah Yunis, a long-time Gadhafi ally before he defected.

Meanwhile, the London Times reported on Monday that a rebel blueprint for a post-Gadhafi
Libya would retain much of the current regime's infrastructure in the hope of averting an Iraq-style descent into chaos.

A 70-page plan prepared by the NTC with help from Western powers and seen by the paper concedes they have little chance of toppling Gadhafi but that internal divisions will force him out.

In that event, the rebels plan to establish a 10,000-15,000 strong "
Tripoli task force" to secure the capital and capture prominent Gadhafi supporters.

Around 5,000 policemen will be recruited to serve as the interim government's security forces, according to the plan.

The rebels claim that 800 current Gadhafi government officials have already been recruited to their cause, and could form a key plank of a post-conflict security apparatus, the paper reported.

The document also maps out how telecommunications, power and transport infrastructure will be secured in the immediate hours after the regime's collapse.

The plan relies heavily on defections, which threatens to cause friction with those within the rebel faction who want a complete purge of the existing order.