Spain demanded Monday details of any U.S. eavesdropping, saying new reports of mass telephone surveillance in the country would be "inappropriate and unacceptable" if proven to be true.

Spain delivered the message to U.S. ambassador James Costos, who was summoned as outrage spread over U.S. snooping on telephone and online communications of both ordinary citizens and world leaders.

U.S. security services tracked 60.5 million telephone calls in Spain in a single month, according to a leaked document published in a Spanish newspaper Monday as European outrage deepened over U.S. snooping.

The National Security Agency tracked the origin and destination of the calls and their duration, U.S. blogger Glenn Greenwald said in a story in El Mundo, which published a classified graph of 30 days of telephone call tracing.

A private museum in southern Spain is opening an exhibition of rare Islamic art and scientific objects that highlight the use of light in decoration and studies in the Arab world.

The exhibition, "Nur: Light in art and science in the Islamic world," is sponsored by the energy company Abengoa and has gathered 150 pieces from collections such those of the Bodleian Library at Oxford University and private collectors from around the world.

Britain said Friday it would complain to Spain about a Spanish research boat that it said unlawfully entered disputed waters off Gibraltar, reviving a simmering diplomatic dispute.

Britain's foreign ministry said the oceanographic survey vessel accompanied by Spanish police boats made unlawful incursions on Wednesday and Friday into waters off the British overseas territory on the southern tip of Spain.

A Spanish court on Friday freed a second convict of the Basque militant group ETA and had 51 further appeals for liberty pending under a controversial European rights ruling.

The country's National Court ordered the release of Juan Manuel Piriz Lopez, who has served nearly 30 years of a 61-year sentence for killing an ex-member and shooting at two policemen in 1984.

Spanish Prime Minister Mariano Rajoy said Friday he would call in the U.S. ambassador to Madrid to explain reports of American spying on the country, a close ally of Washington.

"We do not have evidence that Spain has been spied on ... but we are calling in the ambassador to get information," Rajoy said after an EU summit dominated by the growing scandal over U.S. intelligence activities in supposedly friendly countries.

Spain announced Thursday a dip in its towering unemployment rate in the latest sign that the eurozone's fourth-largest economy is battling its way out of recession.

The jobless rate eased for the second straight quarter to 25.98 percent in the third quarter of 2013, a report by the National Statistics Institute showed.

Morocco on Wednesday prevented some 50 migrants from reaching the Spanish territory of Ceuta by sea, officials said, the latest in a wave of desperate bids by Africans to reach Europe.

"Some 50 illegal migrants tried to reach the occupied territory of Septa this morning (Wednesday) by swimming or in makeshift boats," the governor of Tangiers said in a statement, using the Moroccan name for Spain's tiny north African enclave.

Dozens of imprisoned members of armed Basque separatist group ETA have demanded their freedom after Europe's top rights court ruled that Spain had wrongly extended jail terms, a legal source said Wednesday.

A total 36 ETA prisoners, some sentenced to hundreds of years for their part in a bloody campaign of bombings and shootings, had lodged appeals seeking their release with the Spanish courts, the source said.

Spain escaped from its two-year recession in the third quarter of this year with timid growth as job destruction eased, the country's central bank said on Wednesday.

After nine straight quarters of contraction in the second trough of a double-dip recession, the eurozone's fourth-biggest economy grew by 0.1 percent, the Bank of Spain said in a report.