The Vatican said Tuesday that Bishop Robert Finn had offered his resignation under the code of canon law that allows bishops to resign early for illness or some "grave" reason that makes them unfit for office.

It didn't provide a reason in the one-line announcement. Finn is 62, about 13 years shy of the normal retirement age of 75.

Finn, who leads the Diocese of Kansas City-St. Joseph in Missouri, waited six months before notifying police about the Rev. Shawn Ratigan, whose computer contained hundreds of lewd photos of young girls taken in and around churches where he worked. Ratigan was sentenced to 50 years in prison after pleading guilty to child pornography charges.

Finn pleaded guilty to a misdemeanor charge of failure to report suspected abuse and was sentenced to two years' probation in 2012. Ever since, though, he has faced pressure from local Roman Catholics to step down, with some parishioners petitioning Francis to remove him from the diocese.