MADRID, Spain (CNN) -- The incumbent Basque nationalists won the most seats in Basque regional parliamentary elections on Sunday, but they could lose a 29-year hold on power because three non-nationalist parties won a combined majority for the first time, according to official election results. Socialist candidate Patxi Lopez speaks to reporters after voting Sunday in regional parliamentary elections. The vote for the powerful 75-seat regional parliament and Basque president are seen as a bellwether of the region's sentiment on how to end decades of violence by the Basque separatist group ETA. The moderate Basque Nationalist Party won 30 seats, and its traditional smaller party allies won seven more.
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Elections held for 75-seat regional parliament in Spain's Basque region
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Basque Nationalist Party wins 30 seats, traditional allies win seven more
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Socialist Party and others win a 38-seat majority
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Basque Nationalist Party seeks self-determination for the 2.1 million Basques
Negotiations with other parties to make @placeholder the next Basque president were expected in the coming days.