It is not clear exactly what was launched, but the Joint Chiefs of State of South Korea stated that the military "maintained their readiness by observing relevant movements in preparation for further launches."
Japan's coastguard said in a statement "North Korea appears to have launched a missile" and advised ships to avoid the area.
However, Pyongyang was particularly critical of Trump's advisers and the diplomats around him. And the clock to reach an agreement can run.
Kim said in an important political speech in April that he would let the Trump administration change its negotiating strategy by the end of the year. Since then, North Korea has restarted test rockets and repeated in state media that Pyongyang is giving the United States until the end of the year to solve the problem. It is unclear how serious this deadline is.
This week was also marked for the first time when Kim talked to South Korean President Moon Jin in weeks.
Kim sent a letter to Luna to send condolences to the South Korean leader after his father passed away, according to Luna's cabinet.
The letter was delivered on Wednesday and transmitted to Panmunjom, the common security zone in the demilitarized zone that divides North and South Korea.