Two men arrested by North Korea in March said in interviews with CNN that they spied for South Korea's intelligence agency, the cable television news network reported on Sunday.

North Korea said Kim Kuk Gi and Choe Chun Gil were South Korean nationals working as spies for Seoul's National Intelligence Service from the Chinese border city of Dandong. North Korean state media accused one of them of running an "underground church" and spreading foreign information on USB sticks and SD memory cards in the country. South Korea has called the accusations "groundless."

On Sunday, CNN reported North Korea made the two men available for separate interviews, with official minders present. (cnn.it/1DN1WMv)