Chelan County emergency officials said dispatchers received the threat at 4:53 p.m. Thursday, prompting the partial closure of U.S. Highway 2 in the central Washington mountain town of Leavenworth.
At about 8:15 p.m. responders from multiple local agencies secured the perimeter. No devices were found, authorities said.
No further information about the threat was released.
Leavenworth is in the Cascade Mountains east of Seattle.
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