FORTUNATELY, THIS TIME IT SEEMS it was a hoax:

MADRID (Reuters) - An anonymous caller, claiming to belong to violent Basque separatist group ETA, warned 330 lbs. of explosives had been planted on a popular beach on the Mediterranean coast on Wednesday, police said.

A Civil Guard spokesman said police had received the warning and were searching a beach in the province of Tarragona.

This item was written before it was clear, as it is now according to the Spanish press, that it was a false alarm.