Police say four Texas Christian University football players are among 17 students who have been arrested in a campus drug bust.

TCU Police Chief Steve McGee said the students arrested Wednesday were caught in an undercover operation selling marijuana, cocaine, ecstasy and prescription drugs.

He did not immediately identify those arrested but says their names will be released later in the day.

McGee says the six-month investigation was prompted by complaints from students, parents and others.

School chancellor Victor Boschini calls the students' actions "simply unacceptable." Officials say all 17 students have been expelled.