Yet, there are voices that urge everyone to stay calm.
Arnaldo Otegi is one of such voices, here you have the note that appeared at EITB:
Reaction to Madrid Attack
Batasuna leader Otegi says Basque peace process not over yet
The head of the outlawed Basque nationalist party said on Saturday that Spain's peace process continued despite a bomb attack at Madrid airport that ended ETA's 9-month-old ceasefire.
"The peace process...is not only not over, but now it is more necessary than ever," Batasuna leader Arnaldo Otegi told a news conference in the Basque city of Donostia-San Sebastian.
"What happened in Madrid, if it's confirmed ETA is behind it, doesn't take us back to the scenario that existed before March 24 (in reference to the day ETA declared its "permanent" cease-fire)" he said.He blamed Zapatero's government for a breakdown in peace talks between separatists and Madrid. "There hasn't been a gesture, not a single one, from the Spanish government," said Otegi.