SEOUL: A trash balloon from North Korea landed on a Seoul building rooftop and caused a fire, a local fire department said on Monday (Sep 16), among thousands of balloons Pyongyang has sent southward this year, sparking a tit-for-tat propaganda campaign. "At around 9.04pm on Sunday, a fire broke out on the rooftop of a four-story commercial building in the Western district of Seoul," Seoul's Gangseo Fire Station said in a statement. The fire was extinguished in 18 minutes, with 15 fire trucks