North Korea has accused South Korea of engaging in "psychological warfare" via the volatile medium of Christmas lights.
The tower of lights, situated in Kimpho City, was illuminated on December 22 and will stay lit until January 2. It was erected "as requested by a religious organisation" and can evidently be seen from the North Korea border.
According to North Korean state media: "This is another psychological warfare against the DPRK which can never be tolerated."
It also described the tower as "a crafty artifice to escape public criticism at home and abroad" and warned darkly: "No one can vouch in the light of what the Lee group is now doing that it will not orchestrate a shocking incident in the year-end."
According to The Guardian, the tower was erected because Seoul was humiliated by Pyongyang successfully putting a satellite into orbit on 12 December. (And presumably because the South Koreans are just jealous they don't have a secret unicorn lair).
The newspaper points out North Korea allows sanctioned churches, but many associate Christianity with foreign interference.
There were similar tensions last year when Seoul allowed a church group to hang lights on Christmas tree towers two miles from the border.
RT quotes an official North Korean statement obtained via AFP: “The enemy warmongers… should be aware that they should be held responsible entirely for any unexpected consequences that may be caused by their scheme."
You probably shouldn't have Christmas lights like this if your house is visible from the North Korean border: