Isaac John Christianson, 21, of Mankato pleaded guilty to felony third-degree drug sale of a narcotic as part of a plea agreement on Thursday in Mower County District Court.

According to the court report, a police informant arranged a drug sale with Christianson on Jan. 5. Christianson allegedly sold the informant 0.15 grams of heroin.

The informant arranged another buy with Christianson on Jan. 9. Allegedly, Christianson sold the informant 0.32 grams of heroin.

Christianson will be sentenced on Dec. 14.