Norwegians have been casting their ballots in a parliamentary election that could see the power in the oil-rich nation shift for the first time since 2005 to a centre-right coalition, including an anti-immigration party. Despite Norway's strong economy and low unemployment, Prime Minister Jens Stoltenberg's centre-left coalition has been trailing in opinion polls for months and it looks likely that Monday's election will see a swing to the right. Al Jazeera's Rory Challands reports.