UPDATE 2-North Korea says South Korea should take steps to prevent violation of its sovereignty

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 she appreciates the South ‌Korean Unification Minister Chung Dong-young's expression of his 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 organisation. 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 the drone incident goes ⁠against its ⁠principle of peaceful coexistence with North Korea, and Seoul will work to prevent any recurrence.