The sister of North Korea's ruler said on Friday that South Korean authorities should take steps to prevent "reoccurrence of provocative sovereignty violation," state media KCNA reported, referring to a drone flown into its airspace recently.

Kim Yo Jong, the powerful sister of North Korean leader Kim Jong Un, said in a statement that she appreciates South Korean Unification Minister Chung Dong-young's expression of regret over the "drone intrusion" as "sensible behavior," KCNA reported.

Chung, earlier this week, in his speech at a local cathedral, expressed "deep regret" over a drone sent by a South Korean civilian, according to Yonhap News Agency.

Kim said it was "fortunate" that Chung made the comment, adding that Pyongyang does not care who sent the drone and whether it was an individual or a civilian organization.

Kim Yo Jong, sister of North Korea's leader Kim Jong Un, attends a reception in the Great Hall of People following a military parade marking the 80th anniversary of victory over Japan and the end of World War II, in Beijing on September 3, 2025.
Kim Yo Jong, sister of North Korea's leader Kim Jong Un, attends a reception in the Great Hall of People following a military parade marking the 80th anniversary of victory over Japan and the end of World War II, in Beijing on September 3, 2025. (credit: JADE GAO/AFP via Getty Images)

Why was the drone not detected prior to the incident?

South Korean President Lee Jae Myung, who has sought a conciliatory approach toward Pyongyang, said in January that there appeared to be a loophole in the monitoring system to detect drones operated by local civilians.

South Korea's Ministry of Unification said on Friday that the drone incident goes against its principle of peaceful coexistence with North Korea, and Seoul will work to prevent any recurrence.