JAKARTA, May 16 -- Flash floods struck a tourist resort in Deli Serdang district of Indonesia's North Sumatra province, leaving 7 visitors dead and 14 others missing, an official at the local disaster agency said on Monday.

The disaster occurred on Sunday afternoon when the 21 persons, all of them students, were visiting a waterfall at Durin Sirugun village, the official, Darwin Surbakti, said.

"Suddenly flash floods hit the location and swept away all of them," he told Xinhua by phone.

"Seven bodies have been recovered and the rest are still being search for," Surbakti added.

Heavy downpours at the mountainous areas near the location had sent a huge amount of water to the resort, he said.

No damage of properties was reported after the natural disaster, the official said.

Search for the missing persons is underway now, involving soldiers, police, rescuers from local search and rescue office as well as volunteers, he said.