The Narcotics Control Bureau (NCB) has arrested four persons and seized 1.840 kg of Alprazolam and 9,696 bottles of banned cough syrups in separate operations, an official told news agency PTI on Tuesday.

The NCB's Mumbai zonal unit seized 1.840 kg (15,000 tablets) of Alprazolam, which was to be shipped to the US from the city-based courier office on September 6, and arrested Lucknow-based financier Sameer S, the official told PTI.