Some air traffic control staff at airports in West and Central Africa went on strike over working conditions and pay on Friday as their union defied court rulings and government bans barring them from doing so.
The Agency for Aerial Navigation Safety in Africa and Madagascar (ASECNA), which regulates air traffic control across 18 countries, did not say which flights were affected but told customers to check Notices to Airmen (NOTAMs) posts on airline websites.
ASECNA had said on Thursday that some of its air traffic control staff had threatened a 48-hour strike that could impact flights.