MINNEAPOLIS (AP) - Vandals defaced a sign promoting the University of Minnesota's Muslim Students Association.

Someone scrawled "ISIS" over a hand-painted mural on a bridge connecting the east and west banks of the Twin Cities campus. The acronym is a reference to the Islamic State group.

The Minnesota chapter of the Council on American-Islamic Relations is calling for a hate crime investigation. Executive Director Jaylani Hussein says the vandalism is among a number of recent actions targeting Minnesota Muslims.

The Minneapolis Star Tribune reports that the Muslim Student Association also condemned the graffiti and demanded action from the university.

University President Eric Kaler's office issued a statement calling the graffiti an abhorrent action "that will not be tolerated on our campus."