After a search early Tuesday by explosive-sniffing dogs, Sumner police declared Sumner High School was safe.
Police searched the school after a Sumner High teacher received an email that contained threatening comments directed toward the school, but did not mention individuals.
Information posted on the Sumner School District website said the school will operate on a normal schedule Wednesday (April 5). As a precautionary measure, additional police presence will be on campus.
Officials decided as a caution to close the school and send students home. Students and staff members were dismissed at 9:15 a.m., and after-school activities and athletics were canceled.
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No other schools were affected.
Police asked anyone with information that might help their investigation to call the police tip line at 253-299-5678.