Austin High School lockdown lifted after investigation into 'external threat'

A lockdown at Houston ISD’s Austin High School has been lifted following an investigation into an "external threat" against the campus on Thursday morning, officials say.

According to school officials, the school has received the all-clear.

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The school was placed under a lockdown as a precaution while police investigated, school officials said.

A deputy at the scene told FOX 26 that law enforcement conducted a clean sweep.

While the school was on lockdown, officials said students were safe and the building was secure. No one was allowed onto the campus during that time.

The school said the instructional day would continue normally.