June 28 (Reuters) - Vista Gold Corp VGZ.A
* Vista Gold Corp. provides update on metallurgical testing program at Mt. Todd and announces the extension of its agreement with northern territory
* Says announced that its agreement with northern territory of Australia ("NT") has been extended through December 31, 2023
* Vista Gold Corp says under ongoing terms of agreement, company holds exclusive right to develop Mt Todd gold project Source text for Eikon: ID:nCNWPPx3ya Further company coverage: VGZ.A