PITTSBURGH — A Catholic priest was charged with viewing child pornography on a computer at his church in a borough just east of Pittsburgh, police said Saturday.

According to a police affidavit, an office employee of the St. John Fisher Church in Churchill called the Catholic Child Abuse Hotline after seeing the Rev. Bartley Sorensen, 62, allegedly looking at images of child pornography Friday.

Police obtained a search warrant and discovered at least 100 images of child pornography showing prepubescent males. The computer was not linked to the church’s network.

Sorensen was arraigned on a third-degree felony charge in Pittsburgh Municipal Court and was ordered by District Judge Tara Smith to undergo an evaluation as well as prohibited from using any electronic equipment, according to a report.

“The viewing of pornographic images involving children is a disturbing and criminal act,” said the Rev. Ronald P. Lengwin, a spokesman for the Diocese of Pittsburgh.