Hillside High School lifted its lockdown after officers investigated an incident nearby, according to Durham Public Schools spokesperson.
Durham police on Friday responded to Hillside High School after reports of a suspected robbery in the area.
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The campus was on lockdown for less than an hour as officers investigated the incident.
It marks the second time in as many days a Durham school went on lockdown.
Jordan High School went on lockdown on Thursday due to a report of a weapon on campus. However, officers did not find a weapon after a searching.