Christopher Chibuike (35) and Ifeya (22) were apprehended from Janakpuri two days ago with the contraband, Additional Commissioner of Police (Crime) Ravindra Yadav said.
"They were allegedly indulging in the export of heroin through cargo to various foreign countries by concealing it in auto spare parts. When caught, they had heroin concealed in pistons of automobiles," he said.
Christopher told police that he was going through hard times and due to losses in the export business, he needed quick money to recoup the same and entered the world of drug peddling, Yadav said.
"Christopher offered Ifeaya a good remuneration for help in sending heroin through cargo parcels to China, for which he readily agreed. They had sent three consignments of heroin to China successfully and earned handsome amount," Yadav said.
They allegedly procured heroin from a fellow Nigerian, John.