Other vigils were held across Spain and state employees working abroad did the same in Brussels and Santiago, Europa Press said.

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"It is a gesture that provides a message of unity and repulsion, " Francisco Javier Ansuategui, the central government's Madrid representative, told Spanish news agency Europa Press at one gathering in the capital.

CNN: Thousands pay tribute to latest ETA victim

The Moroccan ambassador to Madrid, Yamal Eddin Mechbal, called on his countrymen "to behave like civilised people, containing your rage and ire" in response to the attacks, the Spanish news agency Europa Press reported.

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