The R.S.F. paramilitary group, facing growing condemnation for atrocities in Darfur, said it had agreed to a cease-fire proposal, but it is not yet clear what the military will do.

President Trump has threatened to send troops to Nigeria, where he says Christianity faces an “existential threat,” an accusation that Nigeria has denied. Ruth Maclean, our West Africa bureau chief, describes how the violence in Nigeria is affecting people of all religions, not only Christians.