The Hungarian prime minister, Viktor Orban, says there is a link between illegal migrants heading to Europe and a rising threat of terrorism. He is seen here speaking on Saturday. Orban's conservative government has erected a four-metre-high fence along its border with Serbia. Orban, whose Fidesz party is losing ground to Hungary's far right, Eurosceptic, anti-immigration Jobbik party, adds that Europe should be preserved for Europeans and Hungary for Hungarians