San Sebastian, Spain - Suspected members of the militant Basque separatist group ETA on Friday made a failed attempt to kill police officers with a bomb trap, Basque officials said.

Police went to investigate a television booster station in a forested area near the town of Hernani where a bomb had exploded overnight, causing a loud blast and material damage, but no injuries.

Two other bombs, which weighed 10 and 4 kilograms respectively, had been hidden near the access road to the booster station. Cables reaching the road would have set the explosives off had anyone stepped on them.

Suspecting a trap, police officers did not go to the site until daylight. They discovered the bags containing the bombs, and rendered them harmless. Officials said they were looking for a possible third bomb.

The attack against the booster station was the first this year attributed to ETA, which is blamed for four deaths in 2008.

ETA has killed more than 800 people in its campaign of four decades for an independent Basque state. The group is listed as a terrorist organization by the European Union and the United States. (dpa)