SAN FRANCISCO — Archbishop Salvatore J. Cordileone's online "Rosary for Peace in Ukraine” Wednesday was disrupted by a suspected cyberattack, according to the Archdiocese of San Francisco, which reported the incident to the FBI.

A suspiciously large surge of requests to access the event temporarily knocked the archdiocese's website offline, the archdiocese said.

“The evidence strongly suggests it was a cyberattack,” Father Patrick Summerhays, vicar general and moderator of the curia, said in a statement Wednesday night. The rosary webpage was determined to be responsible for the outage, he said.

The pattern of this sudden surge in traffic is consistent with a method of cyber attacking called Distributed Denial of Service Attack, the statement said. The archdiocese said the source of the attack could not be immediately identified by the website hosting company.

The archdiocese began publicizing the event Sunday evening on social media and in emails to supporters. You can watch a recording of the event and join in the archbishop's prayers here.

Archbishop Cordileone’s rosary for peace followed the lead of Pope Francis who called for prayer and fasting for peace in Ukraine on Ash Wednesday.