Ethiopia’s government denied starting the second phase of filling its giant hydropower dam on a tributary of the Nile River. Sudan has evidence to suggest Ethiopia began the second phase of filling the reservoir this month, a Sudanese official said Tuesday, citing data on river flows gathered in the downstream nation. Sudanese technical records show changes in the level of the Blue Nile River that indicate water is being pooled, the person said, asking not to be identified as the studies aren’t public.