(ANSA) - ROME, JAN. 14 - Hungary's leader Viktor Orban strikes another blow to the EU, announcing that he will arrest all migrants, even those who legitimately seek asylum. The ultra nationalist government in Budapest, which has already built a wall along its borders and rejects any refugee redistribution plan, knows that he is "against international standards accepted even by Hungary", but "wants to do it anyway". This happens in the most critical moment for the migrants, who face the emergency of exposure to intense cold, especially in the Balkan region. The anti-immigrant measure announced by Orban and justified by the danger of islamic terrorism, was already in force a few years ago. Budapest had decided to suspend it in 2013, under the pressure of the European Union, the European Court of Human Rights and the UN. Since then, Orban said, there have been numerous bloody attacks across Europe and therefore "the interest of our self-defense", must take priority over international rules and Europe. "We have reintroduced the custody of foreigners even for those whose applications for entry in Europe have not yet had a legal outcome", the 53 year old premier and leader of the Nationalist Party. According to Orban, the migrants are a threat to the culture and the safety of Hungarians and in terms of terrorism, too. Therefore, he explained, Hungary has to monitor its borders even more than it did before. "In this country, there will be no trucks investing those celebrating", he said, alluding to the massacres in Nice and Berlin. This additional measure on the part of Budapest is announced the same day that the UNHCR, the UN High Commissioner for Refugees, expressed "deep concern over the situation of refugees and migrants in Europe, severely hit by frost and bad weather". ''We have strengthened our assistance to Greece and Serbia, but we are extremely concerned over the situation, due to reports of continuing rejections in all countries along the West Balkan route", a spokeswoman said, calling on all countries ''to do more to save lives".(ANSA).