The Tunisian Ministry of Transport has banned all flights originating from Libyan airports from its airspace until further notice over security concerns.

Since the overthrow of the Gaddafi regime in 2011, central government control in Libya has steadily weakened, with rival groupings battling for control of the oil-rich North African nation. The situation has worsened in recent months, with effectively a full-scale civil war now raging between several factions.

The main airport in the capital, Tripoli, has been the scene of some of the heaviest fighting, with reports and images from the scene indicating that several aircraft belonging to the two national carriers—Libyan Airlines and Afriqiyah Airways—have been destroyed or damaged. Islamist rebels were reported Tuesday to have gained control of the facility.

According to multiple media reports, the decision to ban flights from Libya followed warnings from foreign intelligence agencies that rebels might attempt to use aircraft captured at Tripoli as suicide bombs.