BHP says it is unaffected by sanctions on China's COSCO

LONDON (Reuters) - The sanctions imposed by the United States on subsidiaries of Chinese state-owned group COSCO have not affected the world's biggest dry bulk shipper BHP , the mining company said, after carrying out due diligence to check.In one of the biggest sanctions actions taken by the U.S. government since its crackdown on Iranian oil exports, Washington imposed sanctions on Chinese companies in late September for alleged involvement in moving crude oil from Iran.COSCO Shipping Tanker..