Air Algerie says it has lost contact with one of its passenger aircraft nearly an hour after take-off from Burkina Faso bound for Algiers.
The airlines said on Thursday the company initiated an "emergency plan" in the search for flight AH5017, which flies the four-hour passenger route four times a week.
"Air navigation services have lost contact with an Air Algerie plane Thursday flying from Ouagadougou to Algiers, 50 minutes after takeoff," the airline was cited by the national news agency APS as saying.
A company source told AFP news agency that the missing aircraft was a DC-9, which can seat up to some 135 passengers, chartered from a Portuguese firm.
According to a source within Air Algerie, up to 110 people are listed as being on board the flight.