Two missiles have been fired by North Korea into the sea.
According to South Korea's military, the most recent launch involved short-range ballistic missiles.
It comes after Donald Trump announced that he had received a "very beautiful letter" from Kim Jong-un.
The US President said the North Korean leader wanted the ongoing join military exercises between the USA and South Korea to stop.
According to reports, the missiles were launched from near the eastern city of Hamhung in South Hamgyong Province.
They landed in the Sea of Japan to the east of the Korean peninsula.

Iran 'would welcome any initiative' to end war, says FM
Israeli forces kill 16 people in Gaza and the West Bank, medics say
Israeli foreign minister denies reports of Lebanon talks
WHO chief says 12 dead in strike on Lebanon's primary healthcare center
India seeks passage of more vessels after some pass through Strait of Hormuz
