At least 15 people were injured by a car bomb at a university in the Spanish city of Pamplona today.
The militant Basque group ETA was suspected of the attack which came after police arrested four suspected members on Tuesday.
“ETA has once again displayed its vileness,” said a spokesman for Prime Minister Jose Luis Rodriguez Zapatero’s Socialist party.
The bomb detonated in a car park at the University of Navarra, shattering windows and setting other vehicles on fire.
Aparicio Caicedo, a 29-year-old doctoral student, said he was studying in the library nearby when the bomb went off.
“Suddenly the whole building shook and there was a huge column of smoke. It was tremendous, a huge explosion,” he said.
He said the bomb went off at a time when many students and other people were walking by the targeted area.
The Spanish Interior Ministry office in Pamplona said 15 people were slightly wounded, apparently cut by flying glass.
Pamplona’s mayor, Yolanda Barcina said she was surprised the casualty toll from the blast was not higher.
“We got lucky with the weather. It is raining, and there were fewer people than usual outside,” she said.
ETA has killed more than 800 people since the late 1960s in its battle to create an independent Basque homeland straddling northern Spain and south-west France.
Navarra borders on the Basque region and is home to many Basque-speakers. ETA says it should be part of the independent homeland it wants to create.
ETA called a cease-fire in March 2006 but resumed attacks in December that year after peace talks with Zapatero’s government failed, setting off a car bomb at Madrid’s airport that killed two people.
Since ending the cease-fire the group has been blamed for seven deaths, including three this year.
ETA’s last fatal attack was a car bombing in late September that killed an army officer in the northern town of Santona.