LUBBOCK, Texas (AP) — Police are investigating who spray-painted the words "No Muslims" on a large reproduction of the school seal outside the Texas Tech Health Sciences Center.

KCBD-TV reports (http://bit.ly/1PnwUH7 ) the graffiti was likely spray-painted late Wednesday or early Thursday. Crews were cleaning the sign Thursday morning.

Texas Tech police told the television station they were investigating.

The center called the graffiti "harmful and offensive."

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