Add North Korea as an interest to stay up to date on the latest North Korea news, video, and analysis from ABC News. It is the fourth time this year a North Korean soldier has defected across the world's most heavily armed border. South Korean military officials said they heard gunfire from the North after South Korea fired its warning shots, but it wasn't clear if the firing was retaliatory. The North Korean soldiers who approached the line were believed to be on a mission to hunt down their defecting comrade. The latest defection was the fourth North Korean soldier to flee through the DMZ this year, the Defense Ministry said.

Source: ABC News December 21, 2017 01:35 UTC