10 women and 5 men were detained on arrival from Johannesburg . London Airport Police found marijuana and cocaine in baggage . Officials : The drugs are estimated to be worth $ 5000 . South African Airways said it launched its own investigation .
10 women and 5 men were detained on arrival from Johannesburg . London customs officials found marijuana and cocaine in baggage . Officials : The drugs are estimated to be worth $ 428,000 . South African Airways said it launched its own investigation .