Two more bombs have exploded in Spain - the latest in a string of attacks in the past 24 hours blamed by police on the Basque separatist group ETA.

Saturday's blasts happened in the southern town of Mijas, between Malaga and Marbella on the Costa del Sol, and in Santander on Spain's northern coast.

There were no reports of injuries in the latest attacks, which came as a summit of European Union leaders was ending in the southern city of Seville.

Three bombings on Friday coincided with the opening of the summit.

Police said the first explosion on Saturday happened in a hotel parking area in Mijas, but it was not a car bomb, unlike the previous Costa del Sol explosions.

Telephone warnings - believed to be from ETA - were received before the Mijas blast and the car bombing in Santander, which happened nearly two hours later.

Santander police managed to cordon off the area targeted before the blast at 1447 (1247 GMT).

ETA has killed more than 800 people in a 30-year independence campaign for the Basque region.

Small charge

The Spanish news agency Efe, quoting police sources, said the Mijas package bomb, which exploded shortly after 1300 (1100 GMT), contained between one and two kilograms of explosives.

ETA wants full independence

It said the device, which was inside a sports bag, had been planted between two vehicles in the car park of the Tamisa Golf hotel.

A roadside call-out association in the Basque country received a telephone warning from a man claiming to speak on behalf of ETA.

Two hotels in the area were evacuated after the telephone warning. The explosion damaged two cars.

Summit targeted

The three car bombs on Friday exploded in the north-eastern city of Zaragoza, and the southern resorts of Marbella and Fuengirola.

Six people were injured in Fuengirola, including three Britons, one of whom underwent surgery in hospital.

Each of Friday's bombs contained about 30 kg (66 pounds) of explosives.

ETA carried out similar attacks on tourist sites last summer.

Tight security

Although ETA does not normally claim responsibility for its actions until weeks afterwards, it typically times attacks to coincide with major political events.

There was huge security at the Seville summit, with about 10,000 police deployed in the city.

On Thursday, ETA accused the EU of leaving the Basques behind, complaining that a "Basque homeland has no place in the current Europe".

ETA wants a state in the Basque areas of northern Spain and south-western France.