The UN's special envoy to Syria says Saturday's massacre in Aleppo province was an horrific event in which more than 130 people were killed. Buses filled with evacuees trying to escape areas besieged by rebels were attacked as they waited to leave. Survivors are now in hospitals in government-held areas. READ MORE: https://on.rt.com/8949<br /><br />RT LIVE http://rt.com/on-air<br /><br />Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday<br /><br />Like us on Facebook http://www.facebook.com/RTnews<br />Follow us on Twitter http://twitter.com/RT_com<br />Follow us on Instagram http://instagram.com/rt<br />Follow us on Google+ http://plus.google.com/+RT<br />Listen to us on Soundcloud: https://soundcloud.com/rttv<br /><br />RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.