During the arrests yesterday morning, police said they found additional evidence that led to six search warrants -- five off-campus and one on-campus -- resulting in the discovery of $10,000 in marijuana, $1,600 cash, a psilocybin mushroom lab and ecstasy pills.

Both Centre County District Attorney Michael Madeira and State College Police Chief Tom King said rounding up small-time dealers can lead to nabbing big-time culprits.

"These kinds of investigations ... are how we work our way up the chain," Madeira said.

The investigations were a joint effort by members of the Penn State University Police Department, the State College Police Department and Pennsylvania State Troop G Vice and Narcotics.

King said yesterday's bust was the result of a "long, nine-month investigation" that was indebted to the work of "the men and women behind the scenes" -- the undercover police who staged the incriminating drug deals.

Eleven of the transactions staged with undercover police took place on the Penn State campus, and 10 of the individuals charged reside on campus, according to court documents. Madeira said the need to arrest students before they left campus for the summer was taken into consideration.

Pennsylvania State Police Lt. Tim Mercer said the public played an important role in the investigation as "law enforcement's eyes and ears." Confidential informants were used on several occasions to set up deals, police said.

Fraternities Alpha Chi Rho, 425 Locust Lane, Delta Tau Delta, 429 E. Hamilton Ave., and Sigma Pi, 303 Fraternity Row, were all named as sites where drug deals were executed.

King said points would be assessed against fraternity houses where drug deals took place. Once a fraternity accumulates enough points in the borough's system, the fraternity can be evicted from the premises.

By the end of the day yesterday, Centre County District Judge Jonathan Grine's office said two of the individuals who had been arraigned were released on bail. The rest of the defendants are being held at Centre County Correctional Facility.

Grine's office said high-end bail was set for some of the defendants at $7,500, with most jailed on straight bail and some unsecured.

The students charged are: Paul J. Stoko, Matthew J. Brahler, Alexander I. Carson, Marius C. Ciuta, Glenn D. Clark, Jacob H. Demarest, William J. Farnsworth, Taner H. Gokce, Kyle J. Higgins, Uche Honnah, Eric D. Klein, Kristopher J. Kollman, Daniel T. Leayman, Michael S. Montgomery, Evan B. Mossman, Joseph M. Navickas, Julian M. Noble, Matthew Patel-Schneider, David A. Perez, Darrell L. Rean, Todd D. Sowers, Michael S. Su, Jeffrey S. Ward, Brandon J. Young and Aleksander A. Zdorovets.

The non-students are: Stacey Kowalske, Luiz Phillippe A. Rebitz, Nathaniel D. Durkin, of State College, Paul J. Guenther, of Boothwyn, Scott Marion, of Archbald and Todd Ulmanic, of Centre Hall.