Police are investigating messages extoling the Islamic State group that were painted on a large rock at Youngstown State University in northeastern Ohio.

University spokeswoman Shannon Tirone says staff discovered the messages when they arrived on campus Monday morning. The messages on the rock outside of the Kilcawley Center read: "We are coming," ''France Deserves Destruction" and "YSU supports ISIS."

Tirone says employees painted over the messages with white paint and some students plan to re-paint the rock with an American flag.

Tirone says the university doesn't believe the messages indicate any credible threat. But she says campus police have reached out to other law enforcement authorities and are searching for the person or persons responsible. The university also is reviewing campus security footage.