The head of the military council in the Libyan city of Sirte, Makhlouf Ben Nasser Al-Ferjani, was shot dead Sunday morning, the Libyan news agency, LANA, reported.
It said the gunmen who opened fire on him fled from the scene immediately.
The deputy commander of one of the military forces in the town, Ali Sadiq, was said to have vowed that the killers would be be apprehended.
Loyalist of former Libyan leader Mouammar Khadafi are being fingered in connection with the murder.
There had been at least two previous attempts to kill Al-Ferjani, who was also commander of the Qardabiya Martyrs Unit – in November 2012 and then on 7 March last year.
Sirte is the third most dangerous city in the country after Benghazi and Derna, after several murders were carried out there, in addition to clashes between Misratis resident there and members of the Qadhadhfa tribe.
In January, the Deputy Minister of Industry, Hassan Al-Daroue, himself from Sirte, was also shot dead in the city.