New Delhi, Aug. 31 -- About 15 people may be missing after a flash flood in Grand Canyon National Park in Arizona, the United States, the National Park Service said in a statement Sunday. Dozens of people were evacuated as the major flash flood at the Grand Canyon swept large boulders, metal structures and other debris into the Colorado River that runs through it, the agency said.

The floods hit the Bright Angel Canyon and Phantom Ranch area on Saturday, the park service said, adding that it was working with Arizona authorities to evacuate people and account for missing individuals. The flash flood, which began about 2:30 pm on Saturday, was caused by rainfall on the Kaibab Plateau, it said.

"The National Park Service is asking the publ...