Danes are voting in parliamentary elections that will determine whether the center-left government of Prime Minister Helle Thorning-Schmidt can continue or whether the center-right opposition will be back at the helm.

Both Thorning-Schmidt's Social Democrats and opposition leader Lars Loekke Rasmussen's Liberals depend on other parties to build a majority in the 179-seat Folketing, or Parliament.

Ahead of Thursday's vote, polls show them neck-and-neck with their campaigns focusing on the impact of immigration on the welfare system, among other issues. Both sides have promised to further tighten Denmark's controls on immigration.

Loekke Rasmussen, a former prime minister, needs support from the populist Danish People's Party that wants border controls back to stop foreign criminals from entering the country.