A group of North Koreans was caught running illegal gambling websites in Cambodia in April, a South Korean government source said Wednesday.
Cambodian police arrested the North Koreans during a raid on a villa in Phnom Penh, where they also seized computers and other related equipment, the source said, speaking on condition of anonymity.
The websites facilitated gambling on football matches.
On April 7, a local Cambodian newspaper reported that 15 North Koreans were arrested and detained in Phnom Penh four days earlier on suspicion of operating illegal online gambling sites.
South Korean intelligence officials said they suspect the North Koreans were illegally earning foreign currency while conducting cyber warfare against South Korea.
North Korea is believed to have more than 1,000 hackers operating from China, Southeast Asia and other countries to conduct cyber warfare against the South, according to the intelligence officials.