A powerful car bomb exploded in Madrid Wednesday following a telephone warning from a caller claiming to represent the armed Basque separatist group ETA, injuring at least 22 people, officials said. The explosion came hours after at least 10 suspected members of ETA were arrested in several Spanish cities, and a week after Spain's Parliament rejected a plan to give the region autonomy bordering on independence. The bomb exploded shortly after 9:30 a.m. (0830GMT) near Ifema, a sprawling convention center where King Juan Carlos was to inaugurate a major art show later in the day, an Interior Ministry official said. He was to have been accompanied by President Vicente Fox of Mexico. The Royal Palace said the ceremony was still on for the evening.
