Forces loyal to Libyan leader Moammar Gadhafi are intensifying their shelling of towns in the country's western mountains, where support for anti-Gadhafi rebels is high.
On Saturday, Libyan government forces shelled four large oil tanks in Misrata, destroying the city's only source of fuel. The blaze spread to other tanks as firefighters battled the flames in vain.
Misrata is the last city in western Libya under rebel control. The port city has been under siege by government forces for more than two months.
On Friday, Libya sharply criticized an international plan to send millions of dollars in assistance to rebels and civilians.
Deputy Foreign Minister Khaled Kaim said that Libya is "one sovereign state." He said the planned use of the funds amounted to "piracy on the high seas."
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