North Korea has fired two short-range ballistic missiles off its east coast, according to South Korea's military, the second such launch in a week.
The two missiles were launched from the Wonsan area early on Wednesday.
Last week's launch was the first such action since US President Donald Trump and North Korean leader Kim Jong-un met in June.
The North called that launch a "solemn warning" to Seoul over its planned military exercises with Washington.
It has previously expressed anger that the annual drills will go ahead next month- an event it sees as preparation for war.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.