All schools in northeastern Colorado’s Brush School District were closed Monday after a “suspicious device” was discovered on campus the night before.

“Late Sunday evening, a suspicious device was discovered on the grounds of our secondary campus,” Superintendent Marsha Cody wrote in a letter posted to the district’s website. “… While the initial assessment has been completed, we will not resume normal operations until the device has been examined by specialized experts.”

The Brush Secondary Campus hosts students from sixth grade to 12th grade, according to school officials.

Brush police officers and firefighters searched the secondary campus, Thornton Primary School and Beaver Valley Elementary on Sunday, Cody said.

Cody didn’t specify the results of the search or what the suspicious

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