Lawyers in the southern Sabha city demanded Monday the Public Prosecutor in Tripoli to immediately investigate the death of their colleague counsel Mokhtar Bin Rajab in his Tripoli prison after his arrest by police upon orders from the Southern Tripoli Prosecution in the past few days.

"We demand an immediate investigation into the incident and the investigation should be impartial, objective and transparent in order to uncover the truth," the lawyers demanded in a statement.

Lawyers’ unions in Benghazi, Tobruk, and Tripoli have held protests to denounce the killing of Bin Rajab and demanded the disclosure of the circumstances of his death.

Bin Rajab died a few days ago after suffering a neurological shock while being held in custody at the police station in Tripoli without being charged, according to Sabha lawyers.