UPDATE: 10:30pm
The security breach that held up all flights and gates at SeaTac Airport has been cleared.

Original Post
Our news partner Q13Fox News is reporting that someone got through the screening process and all planes are grounded as of 8:30 pm Tuesday evening. Passengers are being told they will all have to be re-screened.

People are being kept informed in the airport via public address.

No connecting flights are being allowed to take off.

This story will be updated.