A judge in Spain Saturday summoned international monitors who met with the armed Basque separatist movement ETA for questioning over the whereabouts of the group's fugitive members, a court source said.

Judge Ismael Moreno at the National Court in Madrid "summoned the six verifiers as witnesses", the source told Agence France Presse, referring to the members of the International Verification Commission.

A house fire killed six people including three children in northern Spain on Saturday and a seven-month-old baby was in hospital after surviving the blaze, officials said.

Firefighters and ambulances rushed to a holiday home in Tordomar, near the city of Burgos, in the night to find the country house in flames and several people trapped inside, rescuers said.

Spanish newspapers Saturday dismissed moves by Basque separatist group ETA to start handing over weapons as insignificant, with leading conservative dailies branding it a "farce" and demanding the movement disband.

International monitors on Friday said that a video of ETA members presenting a cache of guns and explosives was a step towards the full disarmament of western Europe's last major violent separatist movement.

Spain bowed to pressure Friday and released "full" footage of an attempt by hundreds of African migrants to swim to the Spanish territory of Ceuta in which 15 people drowned.

Migrants told Spanish media that police fired rubber bullets at them and sprayed them with tear gas on February 6 as they tried to swim a breakwater that separates Moroccan and Spanish waters.

Basque group ETA has begun giving up its weapons, international monitors said Friday, a step towards a historic disarmament by western Europe's last major violent separatist movement.

An expert commission monitoring a ceasefire in ETA's decades-long armed campaign released a video of black-masked members of the group presenting guns, bullets and explosives to monitors.

The Spanish government said Wednesday it has approved the extradition to Kazakhstan of the former chief of security of a Kazakh banker-turned-dissident despite warnings from rights groups that he will face torture.

Aleksandr Pavlov was arrested in Spain in December 2012 after his name was placed on Interpol's wanted list at the request of Kazakh authorities who accuse him of embezzlement and plotting terrorist attacks. He denies the allegations against him.

Spanish banks reported Tuesday record-high bad loans in December as lenders continued to pay for the country's real estate bust even as the financial sector prepared to exit a 41-billion-euro ($56 billion) bailout.

Doubtful loans -- those at risk of not being repaid -- rose in December to 13.6 percent of all credit extended by Spanish banks, up from 13.07 percent the previous month, a Bank of Spain report showed.

A wave of around 250 African migrants on Monday managed to breach the high defenses of the Spanish enclave of Melilla in Morocco, with more than half making it into the EU territory, officials said.

"Around 150 sub-Saharan immigrants succeeded in entering Melilla after launching a massive border assault," the local Spanish government representative's office said.

A group of Moroccan NGOs has called on Spain and Morocco to end "widespread violence" against illegal immigrants, in a letter to Spain's ambassador, after 12 people drowned trying to cross their common border.

"We are deeply concerned to see the close cooperation between Spain and Morocco on border control today resulting in... widespread violence against migrants and security practices outside of any legal framework," the eight NGOs said in the open letter seen by AFP on Friday.

Police in London on Thursday arrested a fugitive killer from the armed Basque separatist movement ETA who is wanted by Spain, Spanish officials said.

Antonio Troitino, 56, was on conditional release from jail in England but Spain had maintained an extradition warrant for him.