North Korea's Kim Yo Jong, the sister of leader Kim Jong Un, said on Tuesday South Korea's hope for an improvement in relations is an illusion that cannot be realised, state media KCNA reported.

The drone was equipped with two cameras that filmed unspecified areas, the General Staff of the North Korean People's Army said.

N. Korea claimed Saturday that S. Korea infringed on its sovereignty with drone incursions in September last year and earlier this week,

North Korea's Kim Yo Jong, the powerful sister of leader Kim Jong Un, urged South Korea to investigate recent drone incidents over North Korean airspace, in a statement carried by state media KCNA on Sunday.

South Korean President Lee Jae Myung says he asked Chinese President Xi Jinping to serve as a mediator to help resolve the North Korean nuclear crisis and ease animosities between the two Koreas.

Elizabeth Salmon, the U.N. special rapporteur on human rights in North Korea, will make an official visit to South Korea in early February

Pyongyang accused Seoul of sending drones to its territory. Seoul rejected the claim, saying it has no intention to make provocations.

South Korea's Joint Chiefs of Staff said in a statement it detected several ballistic missile launches from North Korea's capital region around 7:50 a.m. It stated that the missiles flew approximately 560 miles and that South Korean and U.S. authorities were analyzing the details of the launches.

South Korea launched a probe into possible civilian drone flights after North Korea accused Seoul of airspace violations. President Lee Jae Myung warned of serious security consequences amid rising inter-Korean tensions.

Police and military officials launched a joint investigation Monday to investigate North Korea's claims of drone incursions across the inter-Korean border.