Holocaust survivors said Monday they are through trying to negotiate with the Mormon church over posthumous baptisms of Jews killed in Nazi concentration camps, saying the church has repeatedly violated a 13-year-old agreement barring the practice.

Leaders of The Church of Jesus Christ of Latter-day Saints say they are making changes to their massive genealogical database to make it more difficult for names of Holocaust victims to be entered for posthumous baptism by proxy, a rite that has been a common Mormon practice for more than a century.