On their twitter page, the Mason County Sheriff's Department said they are continuing to search school buildings.
School officials told KIRO Radio there was no confirmed shooting.
This a developing story.
[12:12 p.m.] "Lots of rumors flying around", the Mason County Sheriff's Office tweeted. The Mason County Sheriff's Office reported they were clearing out the middle school and have not found anyone injured.
The sheriff's office is now clearing buildings on the campus.
The district office, neighboring high school and alternative high school are also on lockdown. All police activity is at the middle school. Police advised parents to "hold tight" until further information was available.