US warns of 'third country' sanctions over North Korea

The United States said on Wednesday that it hopes to work with China to halt North Korea's nuclear program, but warned that if this fails it might resort to sanctions.In an address to State Department staff, Secretary of State Rex Tillerson spoke of "third country sanctions," warning that Chinese companies may be hit for working with Pyongyang.Tillerson said China has reaffirmed support for a "denuclearized" Korean peninsula but that Washington would test their commitment to help rein in their n