People's dependence on smartphones and modern technology could bring about the coming of the Antichrist, the leader of the Russian Orthodox Church has warned.
Russian social media users largely responded with humour and scepticism, while some accused the Church of "serving the regime".
Speaking to Russian state TV, Patriarch Kirill said smartphone users should be careful when using the "worldwide web of gadgets" because it represented "an opportunity to gain global control over mankind".
"The Antichrist is the person who will be at the head of the worldwide web, controlling all of humankind," he said.
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"Every time you use your gadget, whether you like it or not, whether you turn on your location or not, somebody can find out exactly where you are, exactly what your interests are and exactly what you are scared of," Patriarch Kirill told Rossiya 1.
"If not today, then tomorrow methods and technology could appear that will not just provide access to all information but will also allow the use of this information.
"Do you imagine what power will be concentrated in the hands of those who gain knowledge about what is going on in the world?
"Such control from one place forebodes the coming of the Antichrist."
Patriarch Kirill said his Church was not against "technological progress", rather "the development of a system that is aimed at controlling a person's identity". But not all social media users were convinced.
Гундяев заявил, что Церковь не выступает против научно-технического прогресса, но беспокоится о свободе человеческой личности.— СмутноеВремя (@Durevestnik) January 7, 2019
Это да... pic.twitter.com/BSJ6h1hsPL
"The Church is not against science and technological progress, but is concerned about the freedom of the individual. Yeah, sure," joked one Twitter user.
— Улыбнитесь, сейчас вылетит Антихрист pic.twitter.com/VYsk0AQCj3— Michael Avrinsky (@gsl2k10) January 8, 2019
"Smile, the Antichrist is about to fly out," tweeted another, along with an image of a woman taking a selfie with Patriarch Kirill and other church representatives.
Patriarch Kirill is close to Russian president Vladimir Putin, who participates in big Church celebrations and has gone on pilgrimages to Mount Athos and other famous Orthodox sites. Many Russian Orthodox priests closely identify with President Putin's nationalist agenda.
At a time when internet freedoms are increasingly restricted in Russia - and authorities are reportedly attempting to create an independent Russian internet - this closeness led some to accuse Patriarch Kirill of lending government policy divine authority.
"They ban international internet in Russia so that the Antichrist doesn't come out of it," one social media user remarked.
On Saturday, the Orthodox Church of Ukraine split from the Russian Church following centuries of Russian leadership, formalising a decision announced in October.
The move sparked a furious response in Moscow and deepened a split in the world wide Orthodox Church.