FACTBOX: Key facts about Basque separatist group ETA

(Reuters) - Two explosive devices went off in seaside resorts in Cantabria, northern Spain on Sunday. The blasts occurred after a warning telephone call from Basque separatists, government officials said.

Following are five facts about ETA:

-- ETA (Euskadi ta Askatasuna, or Basque Country and Freedom) is fighting for an independent Basque state in northern Spain and southwestern France.

-- Spain, the United States and the European Union list ETA as a terrorist organization. The group has killed more than 800 people since 1968, typically with car bombs or shootings.

-- More than 750 suspected ETA members have been detained since 2000.

-- Both Spanish socialist and conservative governments have tried to negotiate with ETA. Prime Minister Jose Luis Rodriguez Zapatero started peace talks after ETA declared a ceasefire in March 2006 but called them off when the separatists killed two people later that year.

-- Spain has banned Basque political party Batasuna for being ETA's political wing, an allegation the party denies. In February 2008 Spanish courts also banned two other Basque parties, the Accion Nacionalista Vasca (ANV) and Partido Comunista de la Tierra Vasca (PCTV) from taking part in March's national election.

(Writing by David Cutler, London Editorial Reference Unit)