Authorities detained an "active attacker" near the University of Virginia (UVA) campus on Thursday.

UVA's Department of Safety and Security posted an emergency alert at about 4:50 p.m. on the university website and social media, warning students of an "active attacker" with a knife near Emmet Street.

Police warned students to shelter in place, and "RUN HIDE FIGHT."

Just before 5:30 p.m., authorities updated the description, noting the suspect was a middle-aged, white man wearing a white shirt, blue pants and white shoes.

Just before 5:50 p.m., police said the incident was "stable" and a suspect was detained.

The shelter in place was lifted and police remain on scene.

This is the second time this week the school's campus was ordered to shelter in place.&nbsp;

Classes were canceled and the campus was locked down on Tuesday. Fox News Digital has reached out to UVA for more information.

<i>This is a breaking news story. Please check back for more later.</i>

<div class="author-bio"><p>Alexandra Koch is a breaking news writer for Fox News Digital. Prior to joining Fox News, Alexandra covered breaking news, crime, religion, and <a href="https://www.foxnews.com/category/us/military" target="_blank" rel="noopener noreferrer">the military</a> in the southeast.</p></div>

Students at the University of Virginia were told to shelter in place and "RUN HIDE FIGHT" after an "active attacker" was said to be near campus. The suspect was later detained.{ai:summary}<p>Authorities detained a suspect described as a middle-aged white man following an "active attacker" alert near the University of Virginia campus. Students were advised to shelter in place as police responded to the situation involving a knife.</p><p>This incident marks the second lockdown at UVA this week, with classes canceled and heightened security measures in place. The shelter-in-place order was lifted after the suspect was detained. #crime</p>

University of Virginia on edge after 'active attacker' with knife captured near campus

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