Customs seizes six kg of heroin and cocaine worth over Rs 47 crore at the Mumbai airport on Friday. Meanwhile, in a documents folder covers heroin was concealed and in clothes, buttons cocaine was kept. However, 4.47 kg of heroin is Rs 31.29 crore, and 1.596 kg of cocaine is valued at Rs 15.96 crore. In the two separate cases, these were seized.