BEIJING, Aug. 21 (Xinhua) -- China's flood control authority Saturday urged more efforts to battle flooding in areas along the Yalu River in northeast China's Liaoning Province, to ensure the safety of local residents.

The Office of National State Flood Control and Drought Relief Headquarters has required relevant departments to focus on the prevention of landslides.

The office dispatched a work team to Liaoning Saturday to assist flood-control efforts.

As of 7 a.m. Saturday, three people were missing and about 51,000 people had been evacuated, after the swollen Yalu River flooded parts of Dandong City in Liaoning.