Police say a bomb has exploded at a television re-transmitter outside a town in Spain's northern Basque region, causing damages but no injuries. A spokesman for the Ertzaintza Basque regional force says the blast occurred around 1 a.m. (0000 GMT) on a hill outside the town of Hernani. He said the installation was not located near houses. The official was speaking Friday on customary condition of anonymity in keeping with department regulations. He said no group had claimed responsibility.