The United States has pushed for a deal that would ensure the reopening of a major tin mine in war-hit eastern Congo, four sources briefed on the negotiations told Reuters.
The fate of the mine was a point of discussion during the recent visit to Kinshasa by U.S. President Donald Trump's senior Africa adviser, Massad Boulos, the sources said, though Washington's involvement goes back several weeks.
Washington and Kinshasa are also in talks about a broader deal on critical minerals partnerships, after Congo pitched a minerals-for-security deal to the Trump administration.
The Bisie mine produced 17,300 tons of tin last year, representing around 6% of global mine supply.
Alphamin announced last month it would temporarily cease operations at Bisie as Rwanda-backed M23 rebels advanced nearby, taking the strategic town of Walikale and openly threatening the mine.
However, the sources told Reuters M23 made the decision because Washington got involved directly with Congo and Rwanda.
They said Washington pressed for M23 to withdraw 150 kilometres from the mine and for Congo's army not to attack the rebels.
The United Nations and Western governments say Rwanda has provided arms and troops to the ethnic Tutsi-led M23.
Rwanda has denied backing M23 and says its military has acted in self-defence against Congo's army and a militia founded by perpetrators of the 1994 genocide.
Boulos was expected to raise the issue with Rwandan President Paul Kagame during his stop in Kigali on Tuesday, the sources said.
Boulos told reporters in Kigali that Washington hoped Alphamin would "make some announcements soon with regards to resuming their operations".
"We definitely encourage them to resume their operations, and we appreciate the dialogue that is ongoing," Boulos said.
Alphamin said this decision was made after the withdrawal of insurgents towards the towns of Nyabiondo and Masisi.
