Trump said Kim had written in his letter that he was “not happy” about the war games and missile tests. He added he could have another meeting with Kim.
The United States and South Korea have kicked off largely computer-simulated exercises as an alternative to previous large-scale annual drills that were halted to expedite denuclearisation talks.
North Korea decries such exercises as a rehearsal for war aimed at toppling its leadership.
The projectiles were fired at dawn on Saturday from an area around the northeastern city of Hamhung, South Korea’s Joint Chiefs of Staff said in a statement.
Large solid-fuel rocket engines for North Korea’s ballistic missile program are most likely being produced at a factory complex in Hamhung, monitoring group 38 North said last year. Hamhung also has a testing site for those engines.
The missile launches on Saturday were apparently testing capabilities of a new short-range missile Pyongyang is developing, South Korea’s presidential office said.
“Because of concerns that North Korea’s series of launches can raise military tensions on the Korean Peninsula, ministers called for North Korea to stop it,” the Blue House said, citing a meeting of South Korea’s top security officials.
Kim Dong-yup, a former naval officer who teaches at Seoul’s Kyungnam University, said the weapons tested on Saturday could be related to the completion of North Korea’s new rocket artillery system that required multiple launches of the same kind.