Islamic State militants have reportedly seized the last border crossing between Iraq and Syria that was under Iraqi security forces control, Sunday. The al-Waleed border crossing (known as al-Tanaf on the Syrian side), which is just to the south of Palmyra, a UN World Heritage site that purportedly fell under the complete control of IS on Thursday.br br the video is mutedbr br COURTESY: RT's RUPTLY video agency, NO RE-UPLOAD, NO REUSE - FOR LICENSING, PLEASE, CONTACT br RT LIVE br Subscribe to RT! br Like us on Facebook Follow us on Twitter Follow us on Instagram Follow us on Google+ Listen to us on Soundcloud: 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.