Quaternion.Slerp with Quaternion.LookRotation causes unexpected results

I'm using Quaternion.Slerp to rotate a GameObject, so it looks at a target, which is a Vector3, but the GameObject rotates different then expected, it looks right up in the "sky", for instance, when it should look at the center of the area (which is not above it).

My code:

public IEnumerator TurnToTarget(Vector3 target, float rotDuration) { // the hunter is turning turning = true; // play the animation //animation.Play("Rotate"); print ("playanim:Rotate"); // the starting rotation Quaternion startRotation = transform.rotation; // the rotation needed to face the target Quaternion newRotation = Quaternion.LookRotation(target.normalized, Vector3.up); /*Vector3 newRotEuler = newRotation.eulerAngles; newRotEuler = new Vector3(newRotEuler.x,transform.rotation.eulerAngles.normalized.y,newRotEuler.z); newRotation = Quaternion.Euler(newRotEuler);*/

     // test if the rotation is equal
     if(startRotation == newRotation)
     {
         // then the hunter has no reason to turn, so he doesn't
         turning = false;
         // exit the coroutine
         yield break;
     }
     
     // set the elapsed time var to 0
     float elapsedTime = 0.0f;
     // turning loop
     while (elapsedTime < rotDuration)
     {
         // add time elapsed since last frame to elapsed time var
         elapsedTime += Time.deltaTime;
         float t = elapsedTime / rotDuration;
         // Slerp to the target
         transform.rotation = Quaternion.Slerp(startRotation,newRotation,t);
         // return here next frame
         yield return null;
     }
     // when done, turning is false
     turning = false;
     
     //transform.LookAt(target);
 }</code></pre>