North Korea's military has ordered artillery units along the border with South Korea to be fully ready to open fire, state media has reported."The Korean People's Army issued a preliminary operation order Oct. 12 to the combined artillery units along the border and the units taking on an important firepower task to get fully ready to open fire," read the statement carried by the Korean Central News Agency.The North Korean military ordered eight artillery brigades fully armed in a wartime mode to be on standby to open fire, and reinforced anti-air observation posts in Pyongyang, it added.North Korea's defense ministry said that South Korea had sent unmanned drones carrying anti-North Korea propaganda leaflets over Pyongyang three times this month, according to South Korea's (Yonhap) news agency."We warn repeatedly that we will take action according to our judgment, regarding any drones to be spotted again as the ones from the ROK and deeming it a declaration of war," a spokesperson at the defense minis try said in a statement.The sister of North Korean leader Kim Jong-un, Kim Yo-jong warned Saturday that South Korea will face a "horrible disaster" in case such drones are flown again into the North.Source: Qatar News Agency