Chinese officials tasked with managing a memorial facility for troops who fought in the 1950-53 Korean War returned to North Korea for the first time in five years, the Chinese Embassy in Pyongyang said Monday.

South Korea fired warning shots after, Seoul says, North Korean troops crossed their border. The soldiers then went back to the North, Seoul said.

South Korea's military fired warning shots on Monday after approximately 10 North Korean soldiers crossed the heavily fortified border separating the two countries, officials said.