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BBCMany people living in regions that used to form part of Hungary have started applying for Hungarian citizenship. Some Slovak politicians have condemned the new law. Slovakia, like Romania, has a large ethnic Hungarian minority. Officially Romania has about 1.5 million ethnic Hungarians, though Mr Szilagyi put the figure at "nearly two million". Southern Slovakia is home to roughly 500,000 ethnic Hungarians, about a tenth of the country's population. More than 250,000 ethnic Hungarians also live in Serbia.
Hungary ceded two-thirds of its territory under the 1920 Treaty of Trianon, after being on the losing side in World War I. That left large Hungarian communities living in neighbouring countries.
Hungary joined the EU in 2004 and has just taken over the EU's six-month rotating presidency.
He stressed that, as EU citizens living in Romania, ethnic Hungarians had the right to move to Hungary and work there well before the new law came into force.
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http://www.bbc.co.uk/news/world-europe-12114289