Updated

Slovenian voters go to the polls this weekend in a parliamentary election expected to produce no clear winner but which could see strong gains by an anti-immigrant party backed by Hungary's firebrand prime minister, Viktor Orban.

Sunday's vote is formally a snap ballot called a few weeks earlier than the regular four-year span following the sudden resignation in March of outgoing Prime Minister Miro Cerar over a failed railway project.

Prime Minister Janez Jansa's right-wing opposition Slovenian Democratic Party, leading the polls with around 25 percent of the votes, faces a new party led by an ex-comedian and several moderate groups from the outgoing ruling coalition.

No party is expected to gain an absolute majority in the 90-member parliament, with negotiations to form a coalition government likely after the balloting.