July 29 (Reuters) - A car bomb exploded outside a Civil Guard barracks in the northern Spanish city of Burgos early on Wednesday, an emergency services spokesman said.
Here is a timeline of some major events since Euskadi ta Askatasuna (Basque Homeland and Freedom) was founded:
1959 - ETA is formed during dictatorship of General Francisco Franco to fight for Basque self-determination.
1968 - ETA carries out first killing: victim is Meliton Manzanas, police chief in the Basque city of San Sebastian.
1973 - Franco’s Prime Minister Luis Carrero Blanco is killed when his car drives over explosives planted by ETA in Madrid.
1980 - In its bloodiest year, ETA kills nearly 100 people despite Spain’s return to democracy.
Sept. 1985 - First ETA car bomb explodes in Madrid. A U.S. tourist is killed and 16 Civil Guards wounded.
July 1986 - Twelve Civil Guards are killed in Madrid and 50 wounded. Juan Manuel Soares, a repentant Basque separatist, is sentenced to 1,401 years in jail in April 2000 for the killings.
June 1987 - Twenty-one shoppers are killed by a bomb at Barcelona supermarket. ETA apologises.
Sept. 1998 - ETA announces a truce. The ceasefire ends in Dec. 1999.
Nov. 21, 2000 - Socialist Former Health Minister Ernest Lluch shot dead in Barcelona.
Oct. 10, 2004 - New Socialist Prime Minister Jose Luis Rodriguez Zapatero appeals to ETA to give up the fight after the arrest of a suspected leader, Mikel Albisu Iriarte, alias "Mikel Antza".
March 22, 2006 - ETA declares a permanent ceasefire, which comes into force two days later.
— Dec. 30 - Car bomb explodes at Madrid airport killing two Ecuadorians. Zapatero breaks off peace process. ETA later claims responsibility for airport bomb.
April 8, 2007 - ETA says it is ready to make new commitments to the peace process if Spain stops "attacks" in the Basque region where police have been arresting ETA suspects.
— Dec. 1 - ETA suspects kill two Guardia Civil policemen working undercover in France.
Jan. 14, 2008 - Zapatero rules out any chance of peace talks with ETA and says its only option is unilateral surrender.
— March 7 - Isaias Carrasco, a former councillor for the Socialist Party, is killed in Mondragon two days before a national election. ETA later claims responsibility.
— May 21 - Police in southwest France arrest top commander, Francisco Javier Lopez Pena, also known as Thierry, in Bordeaux.
— Oct. 30 - A car bomb explodes in a University of Navarre car park in northern Spain, wounding 17 people after a warning call in the name of ETA.
— Nov. 5 - ETA claims responsibility for 10 bombings and says it will press its campaign for Basque rights.
— Nov. 17 - ETA’s suspected military leader, Garikoitz Aspiazu Rubina, known by his alias "Txeroki" or "Cherokee", is arrested in France’s Pyrenean region, near the Spanish border.
— Dec. 3 - Ignacio Uria, an owner of the construction company Altuna y Uria, building a stretch of the high-speed train named by ETA as a target, is shot dead in Azpeitia.
— Dec. 8 - French police announce the arrest of a man identified as Balak, presumed successor to Txeroki and named by Spain as Aitzol Iriondo.
Jan. 21, 2009 - ETA claims responsibility for killing Uria and threatens other people working on the rail project.
— Jan. 30 - ETA vows to keep fighting as it marks its 50th anniversary.
— April 18 - Jurdan Martitegi, ETA’s new military leader known as "the giant" is arrested in southern France.
— June 19 — Eduardo Puelles, a police inspector is killed in a booby-trapped car in the northern city of Bilbao.
— July 4 - Three suspected members of ETA are arrested in France, the fourth such swoop against ETA in the past 22 days, in which 18 of its alleged members have been captured.
— July 29 - A car bomb explodes outside a Civil Guard barracks in the northern city of Burgos, injuring 46 people.