Two policemen were lightly injured early Friday when a car bomb went off in the Basque Country, police blaming the separatists group ETA for the bombing.

The explosive device was placed inside a van parked outside the barracks of the Civil Guard in Durango, a town located in the central Basque region. A Civil Guard spokesman said the explosion occurred at around 3:30 am (0230 GMT) and damaged the nearby building along with other adjacent houses, two servicemen being wounded by pieces of glass.

The remains of a car were found an hour later near Amorebieta, investigator saying it was probably used by the bombers to flee the explosion site.

Friday’s attack wasn’t claimed by any group, but the police said this could be the first attack carried out by ETA after it ended a ceasefire in June.

During the last months, security forces launched numerous operations in order to prevent such incidents and arrested several members of the separatist group. Large quantities of explosives were also seized, specialists and politicians warning that ETA will resume its attacks after this crack-down.

For over forty years ETA has been involved in numerous attacks that left behind at least 800 dead people in northern Spain and southern France. Dozens of kidnappings and extortions were also carried out by the movement labeled as a terrorist one by the European Union, United Nations and the Unites States.

The group is militating for the recognition of an independent Basque Country located in the Basque-inhabited regions of Spain and France.