Washington (CNN) A one-letter mistake on an official White House statement led to consternation and questions about official US policy toward Iran on Monday, and a quiet correction did little to quell the matter.

In the written statement sent to reporters around 7:30 p.m. ET, White House press secretary Sarah Sanders declared that newly unveiled Israeli intelligence proved "Iran has a robust, clandestine nuclear weapons program."

The declaration flew in the face of American intelligence determinations, which found Tehran froze its program following the Obama-era agreement to lift sanctions in exchange for curtailing its nuclear ambitions.

By 9:30 p.m. ET, the statement appeared differently online.

"Iran had a robust, clandestine nuclear weapons program," the online version read, reiterating a long-established US position.

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