The African Union has suspended Sudan's membership "with immediate effect"

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The African Union has suspended Sudan's membership "with immediate effect", amid an upsurge of violence in the capital that has seen dozens killed; the American R&B singer R Kelly has appeared in court in Chicago and pleaded not guilty to the latest sexual assault allegations against him; and a good news story from the medical world as the trial of a drug in West Africa to treat eye diseases has found it has much wider benefits.