Six people were injured Sunday in a car bomb blast suspected to be the work of the Basque separatist organisation ETA in Spain's northern Basque town of Ondarroa, officials said. The blast which went off in front of a police station "injured six people, three policemen and three individuals," a spokeswoman for the Basque interior ministry said. The 4:30 am (0230 GMT) blast, which was not proceeded by a warning, was the second car bomb attack in Spain's Basque country overnight.The earlier blast in the regional capital Vitoria caused no injuries. A coded warning from ETA gave police time to clear the area. Spanish media blamed ETA for both bomb attacks.