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The Standard Missile-3 Block IIA is created to intercept ballistic missiles.

A missile test off Kauai reportedly failed on Wednesday.

Hawaii Emergency Management Agency administrator Vern Miyagi, left, and executive officer Toby Clairmont discuss contingency plans for North Korean missile attacks at the agency's office inside Diamond Head Crater in July.

"We're now one for three", a U.S. official with knowledge of the test told Fox News.A spokesman from the U.S. Missile Defense Agency only would acknowledge a test took place, but refused to reveal the results.

Hawaii's Emergency Management initially blamed the worker for pushing the wrong button, but investigators now say the man actually believed there was a missile heading for Hawaii. "It is a very expensive system and it would undesirable for the credibility of the missile to be hurt", the source said.

They are upgrading the SM3 interceptor missile mounted on the Aegis destroyer, so that it will be able to intercept an incoming ballistic missile over larger areas.

Helicopter crashes into Southern California home
A woman who lives in the neighborhood heard the crash and ran outside to witness the immediate aftermath. A nearby resident told the local ABC7 news channel it "sounded like a train coming through" .

A US official that spoke on condition of anonymity, said test data is being looked at to find out why that interceptor missed its mark.

Our partners at CNN first reported the failure and said Pentagon officials refused to comment, partly because of sensitivities surrounding North Korea.

The same missile was sacked from the USS John Paul Jones off the coast of Hawaii during a test in June, but it failed to intercept its target, a medium-range ballistic missile.

The erroneous message came amid tensions with North Korea, which has tested rockets powerful enough to reach the United States, though it is unclear whether they are yet able to deliver nuclear payloads. Domestic officials say it is created to be capable of intercepting a ballistic missile flying on a "lofted trajectory", which falls toward a target at much higher speed than those fired on a normal trajectory.

The launch was part of the Navy's Aegis Ashore Missile Defense Test Complex.