The ring leaders were identified as Nguyen Thi Quyen born in 1971 and Dao Thi Lan born in 1979, who police suspect were also the couriers transporting the drugs across the borders from neighbouring countries.
  
Lieutenant general Dong Dai Loc said the bust is one of the largest on record and contributes to ensuring social order in the province of Nam Dinh and surrounding localities as TET draws near.