Mali's military government has given the head of the UN peacekeeping mission's human rights division 48 hours to leave the country.
A government spokesman says Guillaume Ngefa-Atondoko Andali had committed subversive actions in his selection of witnesses to testify at UN Security Council briefings on Mali.
A Malian civil society activist who gave evidence at a UN meeting accused the government's Russian military partners of serious human rights violations.
Russian Foreign Minister Sergei Lavrov is due in Mali on Monday for a visit aimed at boosting defence and security ties.