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A few months ago, amid much fanfare, Facebook started rolling out its new tool against fake news which warns users when they try to post fake stories on the platform.。

SEE ALSO:Facebook has new safeguards for profile pictures, but it's just a first step。

The feature, announced in December is the result of a collaboration with "third-party fact-checking organisations" -- such as 。 The feature, announced in December is the result of a collaboration with "third-party fact-checking organisations" -- such as。 Snopes。 and。 The Associated Press。 in the US and
 。 Full Fact 。

in the UK.。

However, that doesn't seem to have stopped blatantly fake stories from growing on the social network.。

The most recent example is a story alleging that a baby "miraculously" survived twelve days after the Grenfell Tower fire in London 。

The story "quotes" detective superintendent Fiona McCormack as saying the baby was on the 16th floor and mentions tweets from the police and the Mayor of London Sadiq Khan. 。

However, no quotes from McCormack were released to the media regarding that particular episode. A quick look at Met Police and Khan's twitter feed show no mention of a baby being rescued.。

The site in question, metro-uk.com, has posted several other hoaxes in the past, and its Facebook page is connected to other infamous hoax websites.。Mashable Light SpeedWant more out-of-this world tech, space and science stories?Mashable Light SpeedWant more out-of-this world tech, space and science stories?Sign up for Mashable's weekly Light Speed newsletter. 。

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This time, it has been fooling people with a particularly nasty trick.。

It uses the BBC's "breaking news" holding image so that when a story is posted on Facebook it seems legit: 。

A URL like that should immediately raise your suspicion level, but it hasn't stopped many people from sharing it on Facebook. Since Sunday, when it was published, the hoax was shared a total of almost 350,000 times: 。

The Facebook users above subsequently deleted the story, which has been shared on Twitter as a "miracle":。

The Facebook users above subsequently deleted the story, which has been shared on Twitter as a "miracle":。

Tweet may have been deleted。

Tweet may have been deleted。

Tweet may have been deleted 。Others flagging it as a hoax:。

Tweet may have been deleted。

Mashable 。began the process of sharing the story on Facebook to see if it triggered a red alert in the pop-up window.。

No warning could be seen:。

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Mashable 。

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reached out to Facebook to seek clarity on the number of complaints needed for a story to trigger a suspect fake news warning, or for it to be taken down. We will update this post accordingly. 。

At the time of publication the fake story was still on Facebook.。At the time of publication the fake story was still on Facebook.。Featured Video For You。TopicsFacebook。