North Korea fired two unidentified projectiles into the sea off its eastern coast on Saturday, South Korea’s military said.
The latest launch comes shortly after the US president, Donald Trump, said he had received a “very beautiful letter” from North Korean leader Kim Jong-un.
North Korea has fired a series of missiles and rockets since Kim and Trump agreed at a 30 June meeting to revive stalled denuclearisation talks.
A US official said that at least one projectile was launched and that it appeared to be similar to previous short-range missiles fired by Pyongyang.
Trump played down the recent North Korean weapons launches when he spoke to reporters earlier on Friday, saying: “I say it again: There have been no nuclear tests. The missile tests have all been short-range. No ballistic missile tests. No long-range missiles.”
Trump also said Kim had written in his letter that he was “not happy” about the US-South Korean war games and missile tests. Kim has said the weapons tests were a response to US-South Korean military drills being held this month. He added he could have another meeting with Kim.