INDEPENDENCE, Mo. - William Chrisman High School students were evacuated for around 30 minutes Tuesday while authorities investigated a threat against the campus.
Police received word of the threat just before 11:30 a.m. Tuesday and the school evacuated students while emergency crews investigated.
Officials said students began returning to class just before noon, after authorities gave the all-clear.
It was not immediately clear what type of threat the school received.
No injuries were been reported.