Libya crisis: Misrata tribes 'may fight rebels'
Tribes loyal to Libyan leader Muammar Gaddafi have said that if the army cannot drive rebels from the besieged port city of Misrata, they will, a senior official says.
Deputy Foreign Minister Khaled Kaim said the army had tried to keep civilian casualties low but the tribes would not show the same restraint.
Col Gaddafi's forces have been pounding Misrata for weeks.
Meanwhile, Nato forces carried out more air strikes on the capital, Tripoli.