Tripoli's Islamic National Gathering on Monday warned of an attempt to undermine the security plan in the northern city, urging the immediate release of the detainee Hussam al-Sabbagh and “all those wrongfully accused of terrorism.”

“The conferees discussed the meager gestures of the government regarding the so-called rectification of the security plan, which means it has acknowledged that certain practices in Tripoli must be addressed,” MP Mohammed Kabbara announced after a meeting for the Gathering.

A Syrian national, 34, was freed after a kidnapping ordeal as police apprehended the kingpin of an abduction ring, Internal Security Forces commander in Tripoli General Bassam al-Ayoubi announced on Monday.

Ayoubi said in a press conference that Syrian national Mohammed Shattat, who owns a chocolate and packaged candies factory in the northern city of Tripoli, was freed due to the efforts exerted by the police in the north.

Tensions were high in the northern city of Tripoli following the army's arrest of a wanted suspect overnight, reported Voice of Lebanon radio (93.3) on Sunday.

It said that tensions mounted after the arrest of Sheikh Hussam al-Sabbagh, who is wanted on terrorism charges, in Tripoli's Abi Samra neighborhood.

The main suspect behind terror cells in hotels in Beirut and the northern region of Fnaideq was killed during a raid in the northern city of Tripoli overnight on Sunday, reported Voice of Lebanon radio (93.3).

It said that Al-Monzer al-Hassan was killed during an Internal Security Forces Intelligence Bureau raid on his apartment in City Complex in Tripoli.

Fighting between powerful militias battling for control of Tripoli's airport broke out again on Friday, just hours after they had agreed a truce, an airport official and witnesses said.

The clashes came as the government sought United Nations help to prevent the country from becoming a "failed state."

Libya's neighbors called Monday for dialogue in the North African nation, which has been wracked by violence since the 2011 overthrow of Moammar Gadhafi that has intensified since a controversial June election.

The six governments agreed to set up twin commissions to broker talks and attempt to prevent any spillover of the unrest from the key oil producer, which remains awash with weapons from the NATO-backed uprising against the longtime dictator.

Deadly clashes raged Sunday around Libya's main international airport, closing in down, as Islamist militia attacked liberal rivals in their Tripoli bastion, in an intensifying power struggle.

Exchanges of fire with heavy weapons forced the closure of Tripoli airport, as foreign ministers from the North African nation's neighbors were to meet later in Tunisia to consider how to aid chaos-riddled Libya.

A suspect died in detention in the northern city of Tripoli's Abi Samra police station as the Internal Security Forces said that the cause of death was from drugs overdose.

According to a communique issued by the ISF command: “At 2:00 am on Saturday Intelligence Bureau members detained in Qabr al-Zeina in Abi Samra 22-year-old M. R. over an arrest warrant issued by the army against him on charges of carrying out robbery operations at gunpoint.”

The families of Roumieh prison inmates decided to suspend their sit-ins in Tripoli as Justice Minister Ashraf Rifi warned on Saturday of "dragging the northern city back into the circle of violence."

"The inmates' families decided to reopen the roads until next Thursday after receiving promises from several Sheikhs and prominent figures in relation to their demands,” OTV reported on Saturday evening.

An indictment issued Friday demanded the death penalty for Arab Democratic Party top official Rifaat Eid and three others on charges of murder and terrorism.

Military Examining Magistrate Judge Riyad “Abu Ghida has issued an indictment demanding the death penalty for Rifaat Eid and three leaders of Jabal Mohsen's fighting frontiers on charges of murder and terrorism,” LBCI television reported.