Valparaiso University in Indiana has increased security and posted a warning to students on its website after receiving a vague threat through some graffiti.
The school says the threat claimed “dangerous and criminal activity” would occur on campus during the university’s daily chapel break on Friday. The message provided no details.
The school says the FBI and local authorities searched the campus but found nothing suspicious.
University spokeswoman Nicole Niemi says classes and other regular activities are continuing as planned.
The university tweeted that Valparaiso did not receive a bomb threat as schools in Texas and North Dakota did. Valparaiso called its situation “substantially different.”
Indiana Homeland Security spokesman John Erickson declined to say whether any other Indiana schools had issued similar alerts.
Meranwhile, North Dakota State University has lifted its evacuation order.
The university ordered all students and employees to leave campus Monday morning after it received a bomb threat.
The university says is will reopen campus at 1 p.m. CDT and classes will resume at 2 p.m. It says university police will spend the next hour unlocking university buildings.
The evacuation order at NDSU came about the same time as one at The University of Texas at Austin, where officials also say they received a bomb threat. FBI spokesman Kyle Loven says the agency is trying to determine if the two threats were related.
More than 14,000 students are enrolled at NDSU. The university cleared its main and downtown campuses following the threat, along with all of its agricultural facilities.