BBC: Many people living in regions that used to form part of Hungary have started applying for Hungarian citizenship.
Thousands applied at Hungarian consulates in Romania on Monday, when a new citizenship law took effect, a Hungarian community leader said.
Zsolt Szilagyi said he thought "hundreds of thousands" would apply in Transylvania, northern Romania.
Some Slovak politicians have condemned the new law. Slovakia, like Romania, has a large ethnic Hungarian minority.
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. >>> Laurence Peter, BBC News | Tuesday, January 04, 2011
