Ten people — including eight College of William & Mary students and a professor — were arrested this week on narcotics distribution charges following a monthslong investigation, Williamsburg police said.

Police said the operation, a joint investigation by Williamsburg authorities and the Tri-Rivers Drug Task Force, seized LSD, cocaine, psilocybin (mushrooms), opioids, amphetamines, steroids, hashish and marijuana. Roughly $14,000 in cash was also recovered, authorities said.

Williamsburg police Maj. Greg Riley said the drugs were being sold on or around the William & Mary campus.

“We have no indication that these individuals were working together,” Riley said.

The criminal investigation began after authorities were told that there were unreported sexual assaults occurring because of increased drug activity on or around the William & Mary campus, Williamsburg police said.

“We were told the assaults were occurring because of increased drug use,” Riley said.

Police looked into the drug activity, which led to this week’s arrests, he said.

Police identified the professor arrested as Gi Sang Yoon, 40, who is facing two felony marijuana distribution charges and one count of possessing hashish. The other nonstudent charged was Timothy Tyrone Pryor, 27 — an employee at William & Mary who is facing a felony marijuana distribution charge.

Yoon is a visiting biology professor and Pryor works in dining services, said Suzanne Seurattan, a William & Mary spokeswoman.

In addition to facing drug distribution charges, the eight students are facing charges of selling drugs within 1,000 feet of a school.

Police identified the students charged as Alexander Patrick Foley, 20; Biloliddin Tulamirza, 18; Daniel Jacob McBride, 20; Devin Moore, 20; Jacob Selmonosky, 18; Keegan Paugh, 22; Nicolas George Manuel, 22; and Shannon Cannaday, 20.

Riley could not provide where the students lived before attending the college. Seurattan said William & Mary has the following mailing addresses on file for the students: Foley, Bel Air, Md.; Tulamirza, Falls Church; McBride, Williamsburg; Moore, Springfield; Selmonosky, Falls Church; Paugh, Rapid City, S.D.; Manuel, Arlington; and Cannaday, Leesburg.

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