Armed militias have roamed the country largely unchecked since the 2011 ouster of Gadhafi.
Gangs of armed men have surrounded key ministries, including the Justice Ministry, trying to force out members of the democratically elected government.
Justice Minister Salah Marghani was forced to evacuate after armed militias surrounded his ministry in April.
Libyan intelligence services have warned that the country is becoming a haven for al Qaeda to regroup and regenerate itself.
Numerous weapons left over after Gadhafi's downfall are providing groups with different motivations to form their own militias, government officials said.