In one of the biggest drugs seizure at Mumbai airport, the Customs department's Air Intelligence Unit on Wednesday seized 74 kgs of a contraband, suspected to be methaqualone, from a Tanzanian national.

"We have arrested Chambo Fatma Basil under NDPS Act who was carrying 74 kgs of the contraband worth about Rs 7.4 crores," Additional Commissioner of Customs Milind Lanjewar said.