Spain's Prime Minister Zapatero has hailed the end of Basque separatist group Eta's armed battle as a "victory for democracy, law and reason".
Jose Luis Rodriguez Zapatero said the 800 victims of Eta's 40-year struggle would be remembered forever and that the "terror" should never happen again.
On Thursday, Eta stated that "definitive cessation" to bombings and shootings.
Politicians have previously rejected such announcements, with Eta having broken ceasefires before.
But correspondents say this time appears to be different, with Thursday's move the latest step in what Eta has called its transition to peaceful methods.