Six German tourists and a Thai tour guide were killed after being swept away by flash floods while exploring a cave at a national park in southern Thailand, police said Sunday.
The victims were trekking through the Khao Sok national park in Surathani province late Saturday afternoon when a heavy rainfall caused flash floods that sent water surging through the cave, which was near a waterfall, said police Lt. Col. Pichan Kanayasiri.
"The tourists were inside the cave and didn't know what was happening outside," Pichan said. "They were trapped inside the cave."
Rescue teams worked through the night trying to save the group. A German man and a Thai man were still believed missing, Pichan said.