Hungary has started building a new fence on its southern border with Serbia as part of its efforts to keep migrants and refugees from freely entering the country. <br /><br /> Two kinds of barriers are being tested before construction begins in earnest. <br /><br /> The government said the new fence which will have electronic surveillance equipment, was needed in case of a new surge of people moving towards Western Europe.<br /><br /> Last year, Hungary built fences protected with razor wire along some 175 kilometers of its border with Serbia and shorter sections on the border with Croatia.<br /><br /> Before the border was sealed in mid-October, nearly 400,000 people passed through the country on their way to Germany and other destinations.<br />
