VATICAN CITY (AP) — 

The Vatican on Saturday arrested a diplomat recalled from Washington last year amid investigations in the United States, Canada and the Vatican for possession of child pornography.

A Vatican statement said that Monsignor Carlo Capella was being held in gendarmerie barracks inside the Vatican, and that his arrest follows a Vatican investigation.

Police in Windsor, Ontario, said Capella allegedly uploaded child porn from a social networking site while visiting a place of worship from over the 2016 Christmas holiday. In the statement, Windsor police accused Capella of accessing, possessing and distributing child pornography.

The Vatican recalled Capella, the No. 4 in its Washington embassy, after the U.S. State Department notified it on Aug. 21 of a "possible violation of laws relating to child pornography images" by one of its diplomats in Washington.

Capella was a high-ranking priest in the Vatican's diplomatic corps. He served on the Italy desk in the Vatican's secretariat of state and was part of the official delegation that negotiated a tax treaty with Italy before being posted to the U.S. embassy last year.