Exit polls in Norway's general election suggest the centre-right opposition is on course to win.
Norway's Labour Prime Minister Jens Stoltenberg has admitted defeat in Monday's general election.
Erna Solberg, who heads the Conservative Party, is expected to replace Labour leader Jens Stoltenberg, who has been prime minister since 2005.
The Conservatives and their allies have won a majority of the seats in parliament, according to official projections with most votes counted.
Ms Solberg may depend on the support of the anti-immigration Progress Party to form a government.
Erna Solberg, who heads the Conservative Party, is widely expected to form a government with the anti-immigration Progress Party.
It was Norway's first general election since attacks by a far-right extremist killed 77 people in 2011.
Mr Stoltenberg said he would step down after presenting the budget next month.
Official projections published by Norway's statistical office after polls closed on Monday evening suggested the centre-right alliance won a majority of the seats in parliament.
It was Norway's first general election since attacks by a far-right extremist killed 77 people at a Labour Party youth camp in 2011.
As well as the Progress Party, Ms Solberg's Conservatives are allied with two other, centrist parties.
The perpetrator of those attacks, Anders Behring Breivik, had previously been a member of the Progress Party.
It is not yet clear whether Ms Solberg will seek to form a majority coalition with the centrist allies, or lead a minority government of the Conservatives and Progress.
Dozens of Labour Party youth activists who survived Anders Behring Breivik's shooting spree on the island of Utoeya in 2011 were candidates, but the wave of sympathy for the party in the wake of the attacks seems to have evaporated.
"The country is doing well, but that's thanks to the oil, not to the leaders," one 29-year-old Progress Party voter told AFP after casting his ballot at Oslo's City Hall.
"It's time we changed the government," he added.
The Progress Party has tried to shake off its association with Breivik, who was once a member but left several years before planning and carrying out his attacks.
The party, led by Siv Jensen, was running third in opinion polls prior to the vote.
But the Conservatives' Ms Solberg wants to continue Norway's existing immigration policies and, if they are to form a coalition government, will have to negotiate with Ms Jensen for her to abandon several manifesto promises, says the BBC's Lars Bevanger in Oslo.
