Three U.S. delegates who made a four-day visit to North Korea that ended Tuesday have briefed South Korean officials about their trip.

The three Korean affairs experts, including Korea Economic Institute President Jack Pritchard, passed through Seoul on Tuesday and explained to South Korea's top nuclear negotiator Wi Sung-lac the results of their visit to Pyongyang.

The delegates departed for the U.S. Wednesday morning. In Washington, they will brief special envoy for North Korea policy Stephen Bosworth about their trip. Bosworth is set to visit Pyongyang December eighth.