Police were yet to disclose the nature of the explosives seized from the duo.
The surge in IT, auto and FMCG stocks were led by investors seeking safety against market volatility.
Nitin Bhatnagar, a Maltese citizen and a former relationship manager of the Bank of Singapore, was taken into custody under the provisions of the Prevention of Money Laundering Act on Tuesday.
The Central Bureau of Investigation (CBI) has set up four teams, each headed by joint directors Ramnish, Anurag, Vineet Vinayak and Sampat Meena, to probe the political violence which ensued after the victory of the Trinamool Congress (TMC) on May 2 in a bitterly fought eight-phase assembly poll in West Bengal.
