Libya unrest: Tripoli calm as Zawiya fight continues
17 August 2011 Last updated at 19:51 BST
Libyan rebels are fighting forces loyal to Colonel Gaddafi for control of a coastal oil refinery in Zawiya, a town just 50km (30 miles) west of Tripoli.
Most of the town is now held by rebels, and the refinery would represent a significant victory, effectively cutting oil and gas supplies to the capital.
But in Tripoli loyalists remain undeterred by the rebels and the government insists it will not fall.
Matthew Price reports from Tripoli.