SHAWNEE COUNTY -Law enforcement authorities in Shawnee County are investigating after a uniformed Topeka police officer received a tainted drink at a fast-food restaurant.

The beverage was tainted with mustard.

The Shawnee County District Attorney’s office has opened a criminal investigating and the restaurant is cooperating, according to a media release.

No additional details were released from police late Monday.

Social media comments indicated the restaurant fired the employee involved in the incident.