Getxo was hit by the Basque Conflict several times, with the town being the location of many ETA attacks.
A long history of ETA attacks made it logical that the group would be viewed as a likely suspect.
Later in the day, the Foreign Ministry called for a United Nations resolution condemning the ETA terrorist attacks.
However, foreigners have been killed or injured collaterally in ETA attacks.
At the same time, the Foreign Ministry called for a United Nations resolution condemning the ETA terrorist attacks.
Before Thursday, the most victims killed in an ETA attack had been 21, in a Barcelona supermarket bombing in 1987.
Three previous ETA attacks in the town had resulted in fatalities.
ETA attacks had also resulted in one fatality on 5 July 1978 and 16 May 1980.
While there have been a number of ETA attacks since 2000, the group has claimed fewer victims.
The group, and therefore the violence resurged in summer 2009, with several ETA attacks leaving three people dead and dozens injured around Spain.