Facebook has announced it will prioritise news sources deemed to be more trustworthy on its News Feed. The firm said the social network community would determine which outlets are reliable via the use of user surveys. Founder and chief executive Mark Zuckerberg said news content would soon make up around 4% of what appeared in people's News Feeds - down from 5% before. The move is the latest attempt by the company to quell the spread of so-called fake news and propaganda on the network. Mark Zuckerberg vows to 'fix' Facebook As part of that continuing battle, Twitter also announced on Friday that it had notified 677,775 US-based users who had retweeted, liked or followed Russian bot accounts on the network in the run up to the 2016 US presidential election. The change is an attempt to shift the key judgements over bias and accuracy away from Facebook's employees, and onto its user base. "We could try to make that decision ourselves, but that&#