Around 200 protesters frustrated with the pace of reforms in Libya have attacked the ruling National Transitional Council (NTC) headquarters in the eastern city of Benghazi, witnesses say.
At least one grenade was thrown as the attackers broke through the gate and into the compound housing the council's offices on Saturday, but there were no reports of casualties.
Residents in Benghazi have been protesting for nearly two weeks, with some demanding transparency and justice from the country's new leaders.
The attack, in the city that was the cradle of last year's uprising which overthrow Muammar Gaddafi, took place as protesters demonstrated outside the NTC office, witnesses and an NTC member told the AFP news agency.
"People were protesting in front of the NTC office and then one grenade was thrown at the office," an NTC member told AFP.
The protesters were reportedly demanding a meeting with the country's interim leaders.
Some have pitched tents outside the NTC's headquarters to protest against a set of election laws they say were drafted by the interim leaders without consulting the public.
The NTC is expected to pass the tranche of laws that will determine how elections for a transitional parliament will be held. The council only took into account public suggestions through an online survey.
"The election laws have not been approved by thousands of Libyans and do not honour those who died for our freedom,'' Tamer al-Jahani, a lawyer taking part in the protest, said. "We don't want to replace one tyrant with another."