Members of Libya's ethnic Berber minority have forced their way into the parliament building in Tripoli, smashing windows and destroying furniture, in a demonstration to push for greater recognition, an assembly spokesman said.
The protest occurred on Tuesday during a break in a regular session at the assembly, General National Congress spokesman Omar Hmaiden said.
There were no immediate reports of casualties, but Hmaiden said furniture had been smashed and some documents belonging to assembly members were missing.
Violence and lawlessness, much of it involving former rebel groups, has hobbled governance in the country since the war that toppled Muammar Gaddafi in 2011.
The indigenous people of North Africa, known to others as Berbers and among themselves as Amazigh, were brutally suppressed under Gaddafi, who considered the teaching of their language and culture to be a challenge to Arab dominance.
They were among the mainstays of the rebellion, with their stronghold in the Nafusa Mountains southwest of Tripoli emerging as one of the main fronts.
Berber was the main language of North Africa before Arabic arrived with the Muslim conquest in the 7th century. It is still spoken in the Sahara and in mountainous parts of Algeria, Morocco and Tunisia as well as Libya.