Iceland’s governing conservative Independence Party held off a stiff election challenge from the Left-Green Movement to maintain the most seats in Parliament, results released on Sunday showed.

But it was unclear who would receive the mandate to form the next government.

President Gudni Johannesson would normally call upon the leader of the biggest party. But the Independence Party, which is led by Prime Minister Bjarni Benediktsson, emerged somewhat weakened.

It lost five seats even though it won just over 25 percent of Saturday’s vote in the second snap election in Iceland in a year.

The conservatives secured 16 seats in the 63-seat Parliament, known as the Althing. It was a disappointing performance for a party that has been involved in nearly every government since Iceland cut its last political ties to Denmark in 1944.