Spain's conservative opposition Popular Party conceded defeat to the ruling Socialists in general elections on Sunday.
"It seems that the (Socialist) victory is clear and they have won a good fight," the PP's chief strategist, Pio Garcia Escudero, said in a televised address.
The government of Spanish Prime Minister Jose Luis Rodriguez Zapatero earlier claimed victory.
"It is a great victory," the Socialist Party's secretary general, Jose Blanco, annnounced on television. "With Zapatero, Spain in 2012 will be better than in 2008."