MATTAWA, Wash. – The Wahluke School District has lifted a lockdown put in place Thursday morning.

The school was on a “teaching lockdown” due to a telephone threat. All classes and activities were back on regular schedule by 1:30 p.m.

According to the Grant County Sheriff’s Office, a teaching lockdown means all exterior building doors and all interior classroom doors are locked.

The threat is currently under investigation.

Students will be released at the normal time Thursday.