Polish security forces turned water cannon on migrants who threw rocks from across the Belarusian border, where thousands have gathered in chaotic attempts to reach the EU, video shared by authorities showed. #MigrantCrisis #Poland #News #Reuters #Belarus #EU #migrants Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en