A bomb has exploded at a hotel in the town of Denia in south-east Spain, Spanish police have said.
The blast happened in the Hotel Port Denia at around 1515 local time (1415 GMT), in the Alicante region, the news agency Efe reported.
It is not yet clear if there are any casualties.
Police said the blast followed a telephone warning from the Basque separatist group, Eta.
Efe quoted police as saying the hotel was evacuated immediately after the warning call, and the bomb exploded about half an hour later.
The blast came two days before the Spanish parliament is scheduled to debate making the Basque region on the Spanish-French border virtually independent - a proposal almost certain to be rejected.
Two weeks ago, a policeman was injured by a car bomb in the town of Gexto, near the main Basque city, Bilbao.
A caller claiming to be from Eta said the group was behind that attack.
Eta has carried out scores of bombings over the past 30 years in its fight for Basque independence in the north of Spain.
Its campaign has resulted in more than 800 deaths.
The group is believed to have been weakened by a series of high-profile arrests and discoveries of arms caches at the end of last year.
Source: BBC News