Western powers appear to have tightened their grip on Libyan airspace following a third night of air strikes.
The on-going bombardment comes as more forces arrive to take part in operation Odyssey Dawn. The US, France and UK remain the principle participants among the allies, with Canada, Italy and Spain also contributing.
Norway is also taking part in the operation, with Denmark, Belgium, the United Arab Emirates and Qatar sending military hardware, notably fighter jets.
The contribution from the two Middle Eastern states is seen as vital with concern growing in the region over the heavy nature of the bombardment.
The head of the Arab League, Amr Moussa, who supported the UN-mandated intervention, criticised its severity saying the air attacks had killed many civilians. Russia’s defence minister has also condemned civilian deaths but his US counterpart has said the coalition is going to great lengths to avoid killing non-combatants. Robert Gates said most Libyan targets are air defences that are not situated near populated areas.