HONOLULU (AP) -
Update 9:15 a.m.
Hawaii Sen. Brian Schatz says a false alarm about a missile threat was based on "human error" and was "totally inexcusable."
Schatz went on his Twitter account after emergency management officials confirmed the push alert about an incoming missile Saturday was a mistake, calling for accountability and an alert process that is foolproof.
The alert stated there was a threat "inbound to Hawaii" and for residents to seek shelter and that "this is not a drill."
The morning alert caused residents to panic.
The Hawaii Emergency Management Agency says it's not clear what caused the alert to go out.
Hawaii emergency management officials say a push alert that warned of an incoming ballistic missile to Hawaii on Saturday was a mistake.
The emergency alert sent to cellphones said in all caps, "Ballistic missile threat inbound to Hawaii. Seek immediate shelter. This is not a drill."
Hawaii Emergency Management Agency spokesman Richard Repoza says it's a false alarm.
He says the agency is trying to determine what happened.
The alert stirred panic for residents on the island and across social media.