A car bomb exploded Thursday in a campus parking lot in Spain's northern city of Pamplona, injuring several people and setting fire to surrounding vehicles, university staff said. "A car bomb went off in the parking lot near the main building" at the University of Navarra, near the Basque Country, said the employee, who said there were "lots" of people milling around the entry at the time. "The fire set off by the explosion spread to other vehicles," she added.