<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:19.9pt;background:white"><span style="color: #222222; font-family: arial, sans-serif; font-size: 12pt;">Facebook said it hadblocked some 30 accounts on its platform and 85 accounts on photo-sharingsocial network Instagram. The move comes over concerns they may be linked toforeign entities and aimed at interfering in US midterm elections.</span></p>''<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:19.9pt;background:white"><span style="color: #222222; font-family: arial, sans-serif; font-size: 12pt;">The announcement camein San Francisco shortly after US law enforcement and intelligence agenciessaid that Americans should be wary of Russian attempts to spread fake news.</span></p>''<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:19.9pt;background:white"><span style="color: #222222; font-family: arial, sans-serif; font-size: 12pt;">A study published lastweek found that misinformation on social media was spreading at a greater ratethan during the run-up to the 2016 presidential vote.</span></p>''<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:19.9pt;background:white"><span style="color: #222222; font-family: arial, sans-serif; font-size: 12pt;">Oxford InternetInstitute researchers said despite an aggressive crackdown by social mediafirms, so-called "junk news" is spreading on social media ahead ofthe US midterm elections. Twitter said on Saturday it d a "series ofaccounts" that attempted to share disinformation. </span></p>