Four people have been arrested on drug charges in connection the Phish concerts.

The Albany County Sheriff’s Office and New York State Police conducted a narcotics investigation at the jam band’s concert at MVP Arena Friday, Saturday and Sunday.

Two people were arrested on Friday.

Ryan D. O’Donnell, 43, who lives in Massachusetts, allegedly had 274 grams of psilocybin (mushrooms), 281 grams of ketamine, 92 grams of cocaine, 173 grams of Xanax pills, and 580 dosages of LSD.

Colorado resident Craig B. Zawsitowski, 49, is accused of having 68 grams of ketamine, 800 doses of LSD, and 51 grams of MDMA.

Two more people were arrested on Saturday. Corey A. Murphy-Egri, 34, of Massachusetts allegedly had 17 grams of ketamine, approximately 7 grams of MDMA and about 3 grams of cocaine.

Vermont resident Thomas J. Kinsman had about 15 grams of Ketamine, approximately 7 grams of MDMA, and approximately 3 grams of cocaine.

All four were arraigned in Albany City Court on multiple counts of criminal possession of a controlled substance.