Pakistan is selling nuclear materials to North Korea and China knows it : US says

Pakistan is continuing to sell nuclear materials to North Korea, even as its urging the international community to accept its membership to the Nuclear Suppliers Group (NSG), said highly placed U.S. sources who track nuclear commerce.
These sources said the Pakistan Energy Commission (PAEC) has been continuing to supply restricted items like 'monel' and 'inconel " material to North Korea in violation of UN sanctions, said by US chief officer.