TOPEKA, Kan. (AP) - The state medical board in Kansas is investigating U.S. Senate candidate Milton Wolf's posting of X-ray images of fatal gunshot wounds and other medical injuries on a personal Facebook page. The Topeka Capital-Journal reports it received a letter from a State Board of Healing Arts attorney disclosing the investigation and asking it to share copies of the images and Facebook commentary from Wolf in its possession. The newspaper first reported Wolf's postings in February. Wolf is a Leawood radiologist seeking to unseat three-term U.S. Senator Pat Roberts in the Republican primary. Wolf campaign spokesman Ben Hartman blamed politically motivated allegations for the investigation. Wolf acknowledged posting the images several years ago, along with dark-humor commentary. He has apologized. The letter from board disciplinary counselor Dan Riley was dated July 14.