SLATINA, Yugoslavia (AP) _ Kosovo's main airport reopened to civilian air traffic Tuesday, nearly two months after NATO closed it to investigate the crash of a U.N. charter flight that killed 24 people.

Group Capt. Nigel Williams of the NATO-led peacekeeping force in Kosovo said all flights at Slatina airport will be during the day, subject to weather conditions. Fall and winter visibility is often hampered by heavy fog.

French investigators had requested that the airport be shut down while they tried to find out why a World Food Program charter flight ferrying humanitarian workers to the province slammed into a mountainside in foggy weather on Nov. 12.

Investigators had questioned whether military air traffic procedures and terminology coincided with those used by the International Civil Aviation Organization.

Williams said the investigation continues but changes have been made so that flight crews will be better informed about flying into Kosovo.

Commercial civilian flights will be limited to two per day on weekdays and four at weekends. The United Nations in Kosovo said charters for aid workers would resume, but gave no timeline.