Botswana said it’s in talks over increasing its shareholding in De Beers, as Anglo American prepares to end its almost century-long relationship with the iconic diamond producer.

As part of a turnaround plan to fend off an approach from BHP Group, Anglo last month said it planned to sell or separate De Beers, in which it holds an 85% stake. The remainder is owned by Botswana, the southern African nation that holds the company’s biggest diamond mines.