Lehigh Career and Technical Institute in Schnecksville was closed Monday after administrators received "multiple threats" at around 9:30 a.m., said school administrators in a post on the LCTI website.
As LCTI is a vocational school that draws students from several county school districts, students that were already on campus Monday morning were sent to their regular high schools instead, administrators said.
The emergency closure came exactly three days after another violent threat cleared the school on Friday, Nov. 11.
Pennsylvania State Police said in a release that they swept the school with K9 units both Friday and Monday and found no evidence of an explosive device.
Both threats were transmitted via the anonymous tipster app Safe2Say, and both remain under criminal investigation, state police added.
Anyone with information is asked to call PSP Bethlehem Criminal Investigation Unit at 610-861-2026.
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