New Delhi, May 13 -- The two Nigerians arrested for running a narcotics manufacturing unit from a house in Greater Noida had stocked enough food and water to last for months and did not step out as they did not want to be being seen in the neighbourhood.

Officials said they had been smuggling the drugs through courier services and international passengers.

Following their interrogation, the Narcotics Control Bureau (NCB) conducted raids in Hyderabad, Bengaluru and Chennai on Sunday.

On Saturday, the NCB arrested the two Nigerians and recovered 1,818kg pseudoephedrine worth an estimated Rs 1,000 crore and 1.9kg cocaine from them.

The NCB got wind of the unit after they arrested a South African woman from Delhi's Indira Gandhi Internation...