Alternative for Germany, a far-right political party under surveillance by intelligence services for suspected extremism, made huge gains in the country’s general election Sunday, with the center-right Christian Democratic Union likely to lead coalition talks to form the next government.

The far-right AfD likely will score its best ever result as Europe's ailing economic powerhouse lurches rightwards. The conservative CDU/CSU bloc is set to win, but will be unlikely to secure a majority.

German citizens aged 18 and up can vote. At least 59.2 million people in the nation of 84 million are eligible, about 2.3 million of them for the first time. Polling stations are open from 8 a.m. to 6 p.m. local time. Four candidates are bidding to be Germany’s next leader in Sunday’s election.