Tunisia announced that it will close its main Tunis-Carthage International Airport to Libyan planes as part of security measures since a suicide bombing in the capital.
“We face a dangerous situation. We have taken a number of security measures,” Transport Minister Mahmoud Ben Romdhane told Mosaique FM radio.
Tunisair suspended its service to Libya in August, but Libyan carriers fly between the two North African neighbours.
Tunisia also closed its border with Libya in November, a day after a suicide bomb attack on a bus in Tunis claimed by Islamic State Jihadists.
The interior ministry said the explosive used in the attack that killed 12 presidential guards was the same used to make suicide belts illegally brought from Libya and seized last year.
On Friday, the interior ministry announced the arrest of two men it said were planning suicide attacks.
The pair, who were not identified, “intended to carry out two suicide attacks, one on Habib Bourguiba Avenue”, the principal thoroughfare in the capital.