A day before Delhi goes to the polls in the penultimate phase of the general election, the Narcotics Control Bureau (NCB) on Saturday claimed to have seized the biggets-ever consignment of more than 1,800-kg of contraband drug pseudoephedrine -- used for manufacturing party drug methamphetamine -- outside the premises of a factory in Greater Noida and arrested three foreign nationals. The NCB also seized 2kg of cocaine.