Spanish Prime Minister Jose Luis Rodriguez Zapatero on Saturday suspended dialogue with Basque guerrillas ETA after a bomb wrecked a car park at Madrid's international airport, breaking a nine-month truce, according to Reuters. At least 19 people were injured in the attack and rescuers were still searching for two missing people. "I have decided to suspend all initiatives for dialogue with ETA," Zapatero told a news conference, effectively ending a peace process he announced in June to end ETA's four-decade armed struggle for independence of the northern Basque Country. "There can be no dialogue with violence," he said. The explosion brought down several concrete floors of the multi-storey car park at about 9 a.m. (0800 GMT), an hour after the first of three telephone warnings of an attack at Barajas Airport's ultra-modern Terminal Four, officials said. The attack took place on a day Barajas airport was crowded with holiday travellers but they were not evacuated until after the blast filled the departure hall with smoke, causing panic.