Authorities blamed human error on the false alarm on Saturday that remained uncorrected for 38 minutes.
Japan and North Korea have a tense relationship, with Pyongyang routinely issuing verbal threats as well as firing missiles near or above Japan.
Hawaii officials initially set out this weekend to test their state's emergency preparedness, as fears about the nuclear standoff between the US and North Korea intensify. "Earlier message was sent in error". He also took emergency management officials to task for taking 30 minutes to issue a correction, prolonging panic. And it wasn't Kim Jong Un or Donald Trump.
The false alarm also should raise concerns about the reactions from USA enemies, Kirby wrote.
The false message was sent in Japanese shortly before 7 PM local time on Tuesday. "There needs to be tough and quick accountability and a fixed process". "We need to help them, too".
She also said the Department of Homeland Security is examining how the US government can quickly verify the accuracy of alerts with agencies such as the Department of Defense.
In addition, Defense Secretary James Mattis was briefed on the situation, a defense official told CNN.
The House Energy and Commerce Committee said in a statement that the hearing by one of its subcommittees would discuss safety communications and receive an update from the Federal Communications Commission "on its investigation into the recent false emergency alert event in Hawaii".
How does the military track missile launches? During that time, many believed a ballistic missile would be the death of them.
Real-world missile launches are detected immediately by satellites that discern the infrared signature right off the launching pad.
More than half an hour passed before they were informed that the warning was a mistake.
"One of the things I appreciate about our siren system is it's very clear about the fact that you are going to activate it, and actually the buttons are highlighted in the way that it's easier to push the cancel", says Keith Stammer. But if it's a stormy Wednesday, many of us might get anxious just the same.
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Trump later declared "the language used by me at the DACA meeting [Thursday] was tough, but this was not the language used". Government funding expires midnight Friday without a deal in place, and some government functions will begin to go dark.