Oslo  - Polling resumed Monday in Norway's parliamentary elections with 3.5 million voters set to decide whether Prime Minister Jens Stoltenberg and his red-green coalition would continue in office.

Stoltenberg's Labour Party is the main force in the coalition that has ruled for the past four years with the Socialist Left Party and the Centre Party.

The main challengers to the Stoltenberg-led coalition are the Progress Party of right-wing populist Siv Jensen and the conservative party led by Erna Solberg.

Opinion polls have suggested a tight race between the two blocs. Political scientist Bernt Aardal told broadcaster NRK that some 10 per cent of voters were undecided, and their decisions could also be a decisive factor. Polling stations close at 1900 GMT. (dpa)