VALPARAISO, Ind. (AP) -- 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.