Facebook has apologised after a glitch in its search function suggested that users might be interested in child sexual abuse videos.
Twitter screenshots show that in the early hours of Friday the site was suggesting users might be looking for a video of a girl performing a sex act, and another video of a girl performing a sex act "under water".
A spokesperson for Facebook told Sky News: "We're very sorry this happened. As soon as we became aware of these offensive predictions we removed them.
"Facebook search predictions are representative of what people may be searching for on Facebook and are not necessarily reflective of actual content on the platform.
"We do not allow sexually explicit imagery, and we are committed to keeping such content off of our site. We are looking into why these search predictions appeared, and going forward, we're working to improve the quality of search predictions."
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Last week, Facebook was criticised after running a survey which asked users if the company should decide whether adult men could use the site to solicit sexual pictures from children.
At the time, Facebook told Sky News: "We have prohibited child grooming on Facebook since our earliest days; we have no intention of changing this and we regularly work with the police to ensure that anyone found acting in such a way is brought to justice."