Protesters stormed Libya's parliament building in the eastern city of Tobruk on Friday, demonstrating against deteriorating living conditions and political deadlock, Libyan media reported.
Several television channels said that protesters had managed to enter the building and committed acts of vandalism, while media outlets showed images of thick columns of black smoke coming from its perimeter as angry young protesters burned tires.
Other media reports said part of the building had been burned.
The parliament building was empty as Friday falls on the weekend in Libya.
Libya's parliament, or House of Representatives, has been based in Tobruk, hundreds of kilometers east of the capital, Tripoli, since an east-west schism in 2014 following the revolt that toppled dictator Moammar Gadhafi three years earlier.
A rival body, formally known as the High Council of State, is based in Tripoli.
Images on Friday showed that a protester drove a bulldozer through part of a gate, allowing other demonstrators to enter more easily, while cars of officials were set on fire.
Later protesters began to break through the building's walls with construction equipment.
Other protesters, some brandishing the green flags of the Gadhafi regime, threw office documents into the air.
Libya has endured several days of power outages, worsened by the blockade of several oil facilities against the backdrop of political rivalries.
"We want the lights to work," protesters chanted.
Talks fail to resolve stalemate
Two governments have been vying for power for months: one based in Tripoli, led by interim Prime Minister Abdul Hamid Dbeibah, and another headed by former Interior Minister Fathi Bashagha, appointed by the parliament and supported by eastern-based strongman Khalifa Hifter.
Presidential and parliamentary elections, originally set for December last year, were meant to cap a U.N.-led peace process following the end of the last major round of violence in 2020.
But the vote never took place because of several contentious candidacies and deep disagreements over the polls' legal basis between rival power centers in the east and west.
The United Nations said Thursday that talks between the rival Libyan institutions aimed at breaking the deadlock had failed to resolve key differences.
Parliament speaker Aguila Saleh and High Council of State president Khaled al-Mishri met at the U.N. in Geneva for three days of talks to discuss a draft constitutional framework for elections.
While some progress was made, it was not enough to move forward toward elections, with the two sides still at odds over who can stand in presidential elections, said the U.N.'s top Libya envoy Stephanie Williams, who facilitated the talks.
The prospect of elections appears as distant as ever since the House of Representatives, elected in 2014, appointed Bashagha, arguing that Dbeibah's mandate had expired.
Recent weeks have seen repeated skirmishes between armed groups in Tripoli, prompting fears of a return to full-scale conflict.
Protests took place in other Libyan cities on Friday including Tripoli, where protesters held images of Dbeibah and Bashagha crossed out.
"Popular protests have erupted across Libya in exasperation at a collapsing quality of life, the entire political class who manufactured it, and the U.N. who indulged them over delivering promised change," tweeted analyst Tarek Megerisi of the European Council on Foreign Relations.
"Things are escalating quickly and the response will define Libya's summer," he added.
Libya's National Oil Corporation said Monday that a blockade at oil installations in the central coastal region of Sirte meant it may declare force majeur, a measure freeing it of contractual obligations because of circumstances beyond its control.
A blockade of two major oil export terminals and several oilfields began in April.
Eastern-based strongman Haftar's forces control major oil facilities.
A drop in gas production contributed to chronic power cuts, which can last around 12 hours a day.