A Nigerian national, believed to be a conduit for an international drug syndicate, was arrested from Kharghar on Friday. The Narcotics Control Bureau found cocaine worth Rs 50 lakh on the accused, who injured two officers before being overpowered.

An NCB officer said they had been tracking the movement of accused Stephen Samuel, alias Tony Yeh, for the past few months. Acting on a tip, they intercepted him at Sector-30 and seized 102 grams of the contraband from him.