Swarms of locusts have invaded parts of Russia, including Sochi, which hosted the Winter Olympics in 2014.<br /><br /> Emergency services say the number of vermin is on the increase due to the migration of the Moroccan locust species from the south of the country. <br /><br /> Authorities assure that the insects are harmless to people, although they pose a serious threat to agriculture.<br />No Comment | euronews: watch the international news without commentary | http://www.euronews.com/nocomment/
