UPDATE, 3:50 p.m. EST — An unverified Twitter account associated with the Jonesboro Police Department tweeted shortly before 4 p.m. EST Thursday that the suspect in question was not an active shooter, but a "man with gun in his vehicle" taken into custody after negotiations.

Campus remained on lockdown.

UPDATE: 3:30 p.m. EST — The director for the Jonesboro E911 emergency answering service, Jeff Presley, told KAIT the Arkansas State University suspect was sitting in a truck with a gas can Thursday.

UPDATE: 3:03 p.m. EST — The university posted on its website that the campus remained on lockdown Thursday afternoon. "Suspect is surrounded by University Police Department and Jonesboro Police," the announcement read. "Incident started when suspect drove into center of campus...few other details available at this time."

UPDATE: 2:55 p.m. EST — An unverified Twitter account associated with Arkansas State University tweeted that no shots had been fired on campus Thursday, and nobody was injured.

Spokesman Bill Smith told the same to KTHV -- that "one individual brandished a weapon on campus," but there was no gunfire.

Original story:

Arkansas State University issued evacuation orders Thursday afternoon when an active shooter was reportedly seen at the student union in Jonesboro. Students posted screenshots of emergency alerts on Twitter shortly after 2:30 p.m. EST, though the college's homepage did not indicate any lockdown notice.

The school, nicknamed A-State, is a public university with more than 13,000 students.

This is a breaking news story. Check back for updates.