The first missile was sacked at 6:49 a.m. USA military authorities admitted that these launches did not show any danger for the northern part of America or Guam.
The US Pacific Command said of the three missiles, the first and third traveled around 250 kilometers in a northeastern direction, revising its initial report that they "failed in flight". One appeared to have blown up nearly immediately, while two flew about 250km in a north-easterly direction, Pacific Command said, revising an earlier assessment that two of the missiles had failed in flight. Although North Korea claims that it is having the ability to send missiles on U.S. mainland, USA defense officials said that these short-ranged missiles did not threaten North America or Guam.
That missile flew for 47 minutes and 12 seconds while reaching a maximum altitude of 3,724.9 kilometres, according to North Korea's state news agency - a distance that analysts said could reach deep into the U.S. mainland when perfected.
White House press secretary Sarah Sanders said President Donald Trump has been briefed and is monitoring the situation.
North Korea fired three short-range ballistic missiles Saturday, the USA military said.
North Korea had walked back from the threat to lob missiles toward Guam, but there had been concerns that hostility will flare up again during the Ulchi-Freedom Guardian drills between the allies that run through Thursday.
Japan urges pressure on North Korea
To the contrary, the number of American troops participating in this year's drills dropped to 17,500 from last year's 25,000. Last month, Pyongyang tested two long-range rockets, which experts saidbrought major United States cities within range.
The test comes a day after a key national holiday in the reclusive nuclear-armed country.
Analysts said the launches appeared to be a response to the ongoing joint exercises between the United States and South Korean militaries, exercises that North Korea always strongly protests because it considers them preparation for an invasion.
North Korea's state media released photos Wednesday that appear to show the designs of one or possibly two new missiles. "All of a sudden, I don't know, who knows, but I can tell you, what I said, that's not strong enough".
This latest North Korean missile test would be the 12th ballistic missile test this year.
Hwasong is what North Korea calls most of its missiles, including its only ICBM - the Hwasong-14, which it tested last month. However, it was not immediately clear whether the missiles were short or long range. The recent missile launches violated the resolutions of the United Nations, although short-range ones are less provocative than ICBM missiles which have a potential to hit the USA mainland.
On Aug. 8, Trump threatened North Korea with "fire and fury like the world has never seen", touching off a war of words between the two governments.