The bombardment was reported in Zawiyah, a city located some 50 kilometers west of Tripoli.
The violence act came hours after demonstrators took control of the strategically important town.
Two thousand people have been reported killed in the weeks-long violence.
The embattled regime has recently used aerial attacks and poison gas against the peaceful protesters.
Reports also say forces and foreign mercenaries loyal to Gaddafi have surrendered parts of Tripoli to pro-democracy protesters.
The residents of some neighborhoods in the capital have barricaded their streets and are openly showing defiance.
The anti-government demonstrations continue across Libya as more cities fall into protester control.
Protesters have already seized control of several cities including Libya’s second largest city, Benghazi. They are calling for an end to the long-time rule of Colonel Gaddafi.
Meanwhile, Libyan protest leaders have established a transitional national council in cities seized by anti-regime forces.
Gaddafi has recently announced plans to arm his supporters to fight his opponents.
The UN Security Council has imposed sanctions on the Libyan regime and has referred Gaddafi to the International Criminal Court.