A Libyan senior oil official who represents his company in the OPEC cartel is believed to have been abducted in the militia-held capital Tripoli, a company official said Tuesday.

Samir Salim Kamal, an engineer with the National Oil Company who is also Libya's governor for OPEC, has not been seen since Thursday when he left the company's offices.

The military prosecutor charged on Tuesday 28 people, four of them detainees, in the double suicide bombing that rocked the Jabal Mohsen district of the northern city of Tripoli earlier this month.

The state-run National News Agency said the charges issued by Judge Saqr Saqr include membership to an armed terrorist organization for the purpose of carrying out terrorist activities.

When Lebanese authorities announced the arrest last week of three alleged jihadists planning suicide bomb attacks, Elie Warraq's family was stunned to see his name among the accused.

Warraq, 22, would hardly be the only young man in Lebanon lured to the ranks of Sunni Muslim extremists -- but he appears to be the first Christian.

Maronite Patriarch Beshara al-Rahi on Sunday visited the Tripoli district of Jabal Mohsen to offer condolences to the families of the victims of the recent suicide bombing that killed nine people at a packed cafe.

“We came here to thank you for the beacon of tolerance and entire Lebanon appreciates you for dousing the flames of vengeance,” said al-Rahi.

Lebanese young man Hussein Haidar, who hails from the northern city of Tripoli, has been killed while fighting alongside extremist Sunni groups in Iraq.

The Tripoli News Network Facebook page announced on Saturday the death of Haidar, who is nicknamed “Abu al-Walid", saying he was killed fighting alongside the Islamic State group.

The Lebanese army said a suspect was injured in a clash after attacking a patrol in the northern city of Tripoli on Thursday night as the military announced a series of arrests it has made.

The army said in its communique that the patrol came under fire by Khaled Zakaria al-Khaled when it interfered to disperse gunmen involved in a family fight in the area of al-Beddawi.

Libya's warring factions have agreed on a roadmap to form a unity government after two days of U.N.-brokered talks in Geneva, touted as the last chance to avert total anarchy in the country.

The North African nation has been wracked by conflict since the overthrow of dictator Moamar Kadhafi in a 2011 uprising, with rival governments and powerful militias battling for control of key cities and the country's vast oil riches.

The army revealed Thursday that its Intelligence Directorate had thwarted a plot to carry out a “series of suicide attacks” in the wake of the deadly twin bombing that rocked Tripoli's Jabal Mohsen.

Military intelligence agents arrested “Bassam Hussam al-Naboush, Elie Tony al-Warraq, aka Abou Ali, and Syrian national Muhannad Ali Mohammed Abdul Qader, who were plotting to carry out terrorist operations against army posts and residential neighborhoods,” the Army Command said in a statement.

The March 14 general-secretariat congratulated on Wednesday Interior Minister Nouhad al-Mashnouq and security forces on the closure of the notorious block B of Roumieh prison that lies east of Beirut.

“Al-Mashnouq took a brave decision to end the chaos at Roumieh prison,” said the general-secretariat following its weekly meeting.

Lebanese security forces will strictly implement a security plan established for north Bekaa in cooperation with Hizbullah, media reports said on Wednesday.

As Safir newspaper reported that the recent security incidents across Lebanon prompted officials to decide to crack down on violators in the Bekaa to redeem the state's authority and credibility.