Mumbai Customs has achieved a historic milestone by seizing an estimated 180-200 tons of smuggled diesel, marking the largest such seizure in the history of Indian Customs. The illicit fuel was discovered concealed within the water tanks of the cargo barge MV Tina 4. Acting on specific intelligence, customs officials intercepted the vessel and uncovered the sophisticated smuggling operation. Investigators found that one of the barge's water tanks was not part of its approved design, indicating deliberate modifications to facilitate the concealment of the contraband. Statements from the vessel's master, engineer, and a representative of the shipping line revealed that the diesel was sourced from foreign vessels and intended for sale to local coastal boats, thereby evading customs duties. This significant bust is part of a larger trend of fuel smuggling along India's western coast, with organized syndicates exploiting maritime routes. The operation has led to the arrest of the vessel's master and the son of its owner, and authorities are continuing their investigation to expose a wider smuggling network. This seizure follows a previous bust earlier this month where Mumbai Customs seized 40 tons of diesel valued at approximately Rs 1 crore.