Wichita — A psychiatrist was stabbed to death in an alley behind his holistic practice in Kansas and a man identified as one of his clients has been arrested in the killing, police said Thursday.

Achutha Reddy, 57, was killed in the attack Wednesday evening at the Holistic Psychiatry Services clinic in Wichita. Police Lt. Todd Ojile said the suspect in custody was Reddy’s client, but that authorities do not know what prompted the attack.

Police said the suspect and Reddy had been seen entering the clinic together earlier in the day. The suspect left and later returned, and the two entered an office together. The office manager heard a disturbance, found the client assaulting the doctor and tried to intervene, allowing Reddy to flee the building. The suspect followed Reddy into the alley where the doctor was stabbed multiple times, Ojile said.

The 21-year-old suspect was arrested shortly thereafter after a security guard at the Wichita Country Club called police because a bloodied man was sitting in a vehicle in the parking lot.

No charges have been filed, but the man was being held on suspicion of first-degree murder. Ojile said investigators expect the case to be presented to the district attorney’s office on Friday.