The Libyan air forced attack five naval targets off the eastern city of Benghazi on Monday, said a media official of the army.
Jet fighters stroke five vessels loaded weapons and ammunition for militias in the city.
They were approaching M'reisa port, said the official.
Libya plunged into chaos following the 2011 uprising against Muammar Gaddafi. The ouster of Gaddafi gave rise to a patchwork of heavily-armed militias and deep political divisions.
The country has been witnessing numerous clashes between government forces and rival militia groups, which refuse to lay down arms