The school was briefly placed on lockdown.
The school was briefly placed on lockdown. FatCamera/Getty

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The King County Sheriff's Office is reporting that a Tyee High School student in SeaTac was arrested after he brought a handgun to school this morning.

According to the Sheriff's Office, the student posted pictures of the weapon on social media over the weekend and was searched by school security this morning. School security found a handgun and the school was briefly put on lockdown while police and security looked for the student's friend. The lockdown has since been lifted, and the student was taken into custody.