North Korea on Monday called US National Security Adviser John Bolton a "war monger" after he termed the North's recent missile tests a violation of UN resolutions.
In a statement, the North's foreign ministry said giving up missile tests would mean giving up the right to self-defence.
"His claim is indeed much more than ignorant," the unidentified spokesman said. "Our military drill neither targeted anyone nor endangered the surrounding countries, but Bolton makes dogged claims that it constitutes a violation of the 'resolutions', poking his nose into other's internal matters.
"It is not at all strange that perverse words always come out from the mouth of a structurally defective guy," the spokesman said.
The White House has played down the tests, with US President Donald Trump tweeting, "North Korea fired off some small weapons, which disturbed some of my people, and others, but not me."
China on Friday launched an uncrewed spacecraft on a nearly two-month mission to retrieve rocks and soil from the far side of the moon, the first country to make such an ambitious attempt.
Police forcibly removed scores of defiant pro-Palestinian protesters at several colleges on Thursday, including taking down an encampment at UCLA in a jarring scene that underscored the heightened chaos that has erupted at universities this week.
The Indonesian government will permanently relocate almost 10,000 residents after a series of explosive eruptions of the Ruang volcano has raised concerns about the dangers of residing on the island in future, a minister said on Friday.
A magnitude 6.0 earthquake struck off the island province of Leyte in central Philippines on Friday, with damage and aftershocks expected, its seismology agency said.
Indian opposition leader Rahul Gandhi will contest the general election from the family bastion in the north, his Congress party announced on Friday, a move that will challenge Prime Minister Narendra Modi in a region he dominates.