Former Libyan prime Minister Ali Zeidan blamed radical and extremist groups for the deteriorating security situation in Libya.
"These groups are seeking to be on the top of the political scene," he told Sky News Arabia.
"They are seeking to return Libya to the square one," Zeidan said.
Clashes with artillery and rockets spread on Thursday into two districts in the capital Tripoli where rival militia brigades were battling over the airport in Libya's worst fighting since the 2011 revolt that ousted Muammar Gaddafi.
Nearly 200 people have been killed since the violence erupted two weeks ago in Tripoli and also in the eastern city of Benghazi.
Three years after the fall of Gaddafi, Libya's fragile government and weak army have failed to impose authority on heavily armed brigades of former rebels.
Source: MENA