Washington ? President Barack Obama says he is shocked and outraged over the killing of an abortion provider at a Kansas church.

Dr. George Tiller was shot and killed Sunday morning while he was serving as an usher at a church in Wichita, Kan. The White House released a statement from the president Sunday evening.

Obama says violence is not the answer to resolve differing opinions on abortion and said the shooting is a murder. Tiller was one of the nation’s few providers of late-term abortions. He was the object of decades of protests and attacks.