In this photo provided by Jason Penry, a truck is parked on the lawn in front of the student union at Arkansas State University, Thursday, Dec. 10, 2015, Jonesboro, Ark. An armed man who had posted on Facebook that he was homicidal drove onto Arkansas State University on Thursday, sparking a campus lockdown before police took him into custody without any shots fired, university and police officials said. (Jason Penry via AP)

Arkansas State University went on lockdown on Thursday afternoon after a truck suddenly drove onto the lawn by the student union building, and witnesses reported that the driver was armed, according to a university spokesperson.

University officials advised the campus community by text alert to lock doors and shelter in place. Shortly afterward, they posted an update on social media.

A few minutes later, officials posted, “Campus still in lockdown. Suspect is surrounded by University Police Department and Jonesboro Police.

“Incident started when suspect drove into center of campus . . . few other details available at this time.”

A spokesperson for the local police department could not be immediately reached Thursday afternoon.

Shortly before 4 p.m. school officials announced on social media that a suspect was in custody and that the school remains on lockdown. A spokesperson said that was a precaution as police investigate what was in the truck but that he had very little information at this point.

There have been frequent threats, or feared threats, on college campuses this fall in the weeks after a student walked into an Oregon community college classroom and fatally shot down nine people. Protests over race have heightened tensions on many campuses.

[Harvard evacuates four buildings over bomb threats, which were unfounded]

[Eastern Kentucky University shuts down over written threat to “KILL ALL"]