Africa Corps fighters in central Mali are accused by refugees and clinic staff of rape and other sexual assaults, including an attack that left a 14-year-old girl in critical condition when she crossed into Mauritania and reached a makeshift MSF clinic.MSF's Mirjam Molenaar and the clinic women’s health manager Bethsabee Djoman Elidje said stigma, security constraints and an overcrowded border camp are hampering care and accountability, while AP reporting and UN sources say many cases go unreported and Russia's Defense Ministry did not respond.