Rights and Accountability in Development has written to top executives at Barrick Gold and Randgold Resources ahead of the merger between the two companies, warning them about human rights abuses at Acacia Mining’s North Mara Gold Mine in Tanzania. Acacia Mining is a subsidiary of Barrick Gold. The letter describing an alleged  pattern of human rights abuses by security personnel and Tanzanian police operating jointly at Acacia’s North Mara. Business and Human Rights Resource Centre invited Acacia Mining to respond. Acacia Mining denied the allegations and said its North Mara’s grievance process meets the UN’s Guiding Principles on Business and Human Rights.