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00:00:00
>> Ahead of Mexico's presidential election on Sunday, voters have been inundated with a flurry of fake news on social media. Researchers say these false stories are rapidly popping up on Facebook and Twitter, often taking the form of videos, images, and means that multiply faster than can be detected.
00:00:22
The most high profile target of the propaganda is frontrunner Andreas Manuel Lopez Obrador. Reuters correspondent Julia Love is outside Facebook's office in Mexico City.>> Researcher say they have found a host Facebook pages that are attacking the Leftist front-runner, Andres Manuel Lopez Obrador. The pages have thousands of likes, but they don't have any comments or other interactions from users, which the researchers say is a classic sign of automation.
00:00:51
In addition, there have also been tons of fake news stories circulating. Some say that the pope has criticized the Leftist, Andres Manuel Lopez Obrador. And others falsely claim that Ricardo Anaya, the number two candidate, has endorsed Donald Trump's plan of building the wall.>> Facebook faced a severe backlash over fake news after the 2016 US election, with many lawmakers fearing the false articles spread on Facebook swayed the results.
00:01:23
Now, Facebook is trying to crackdown. This time, in Mexico.>> The company has hired more content screeners, they're funding outside research, and they have also struck contacts with fact checking groups. Nevertheless, we have still found many pages that have been criticized for sharing fake news that are still present on Facebook with huge followings.
00:01:45
For example, one page, Nacion Unida, has been criticized as one of the most prolific distributors of fake news, but they still had more than 800,000 followers on Facebook as of this week. And fake news operators are getting smarter. WhatsApp, a message service owned by Facebook that's popular in Mexico, has become a prime channel for spreading false stories in closed groups, leaving the company, researchers, and authorities in the dark.