Police used stun grenades against the crowd as hundreds of refugees breached police lines. Migrants are being held behind barbed wire on the Greek side of the border with Macedonia. Macedonia has declared a state of emergency on its southern and northern borders over a surge in migrants and refugees. READ MORE: http://on.rt.com/6pjiRT LIVE http://rt.com/on-airSubscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaTodayLike us on Facebook http://www.facebook.com/RTnewsFollow us on Twitter http://twitter.com/RT_comFollow us on Instagram http://instagram.com/rtFollow us on Google+ http://plus.google.com/+RTListen to us on Soundcloud: https://soundcloud.com/rttvRT (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.