On March 5, 2017, a large number of containers containing concentrates were seized for investigation, and exports suspended. 
Mnamo Machi 5, 2017, idadi kubwa ya makontena yaliyokuwa yamebeba makinikia yalikamatwa kwa ajili ya kufanyiwa uchunguzi, na kufanya taratibu za kuyasafirisha nje ya nchi zilisitishwa.