Thousands of people marched in Bilbao in northern Spain today calling for the return of prisoners from the armed Basque separatist group ETA being held outside the region.
Former ETA prisoners for the first time led the march in the Basque region's most populous city. Past marches have been led by family members of the convicts, who are dispersed across dozens of prisons in Spain and neighbouring France.
The demonstrators, many of them waving red, white and green Basque flags, chanted "prisoners to their home" as they made their way through the streets under an overcast sky to city hall where letters from three ETA prisoners were read out.
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Otegi, who is credited with helping end violence in the northern Spanish region, has said he aims to become the next leader of Spain's Basque Country which will hold regional elections at the end of the year. He declined to speak to reporters at the march
The protest was called by a group of former ETA prisoners.
ETA is blamed for more than 800 killings in its campaign of bombings and shootings to create an independent Basque homeland in northern Spain and southwestern France.
The group's last deadly attack in Spain was in August 2009.
In October 2011, it declared a "definitive end to armed activity" but it has yet to formally disband or disarm as the Spanish and French governments demand.
The group wants negotiations on several issues, including the fate of around 400 ETA prisoners, before it fully decommissions its armed wing. Many ETA prisoners are kept in jails far away from the Basque region, making visits from family difficult.
In its most recent statement issued last month, ETA said "the consequences of the conflict have not been resolved, the main knot being the situation of Basque political prisoners which still has not been untangled."
The Spanish and French governments have refused to negotiate with ETA.