At least three French tourists died Monday when a boat on which they were traveling sank in the Mekong River near Phnom Penh, police said.
The boat was carrying 22 French tourists when it rolled over after some passengers sat on the roof, according to a preliminary report.
A police officer said that 18 were rescued and taken to a hospital, three died and another was missing.
Police said it was the first fatal boating accident involving foreigners since tourism was revived in Cambodia several years ago. The tourist industry was virtually inactive for about two decades due to war and unrest beginning in 1970.