Comair Limited (Comair) has confirmed a verbal threat was made by a passenger and an accomplice on kulula.com flight MN 120 from Cape Town to Johannesburg.
The captain was alerted to the verbal threat that was made by a passenger on board the flight. The captain followed standard procedure by returning the aircraft to the airport.
Comair has confirmed that at no time were any of the passengers or crew in any danger.
The South African Police Services were alerted of the incident and are on hand to apprehend the offenders when the aircraft landed at 11.38am back at Cape Town International.
Comair will release further information as soon as it is available.