At least four Libyans have been killed  in clashes between protesters and militants in the northeastern city of Benghazi.
The deadly confrontation happened late on Friday and continued until early Saturday after angry people gathered around the headquarters of a militant group, accusing it of being behind attacks across Benghazi. 
"Angry citizens, some of whom were armed, demonstrated around the headquarters of the February 17 Martyrs Brigade ," a security official said.
According to medical sources, 16 people were injured in the gunfight between the two sides.
Benghazi, which is known as the cradle of the 2011 revolution, has been plagued by violence that has killed dozens of security forces, judges and foreigners.
Saturday’s protest was held a day after gunmen killed the head of general intelligence in Benghazi. 
Colonel Ibrahim al-Senussi Akila was murdered near the Medical Center in Benghazi on Thursday.
Libya has been witnessing numerous clashes between government forces and rival militia groups , which played a key role in the 2011 popular uprising that toppled former dictator Muammar Gaddafi.
Nearly three years after the end of Gaddafi’s four-decade rule, the country is still grappling with rising insecurity.
The former rebels refuse to lay down arms  despite the authorities’ struggle to assert their control over the country.
Thousands of angry Libyan demonstrators have recently taken to the streets in different cities to protest against lack of security across the North African country.