District leaders notified Warminster police late on Thursday, April 20 that an anonymous caller phoned in an unspecified threat against William Tennent High School, the department said in a release.
Though the threat was directed at WTHS, Warminster police say they and Upper Southampton police are present at every CDS school on Friday, April 21 "out of an abundance of caution."
Detectives are continuing to investigate the threat, they added.
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