CNN 's partner station in Spain , CNN + . Watch report on Pamplona car bomb Â '' No device was found and the search was called off Thursday afternoon , according to a university spokesman and a representative for the national government 's main office in Navarra . Most of the campus was reopened ; only the area surrounding the bomb blast remained cordoned off , they said . Classes are expected to resume as scheduled on Friday , the university spokesman said . The car bomb sparked a massive fire in the campus ' Central Building , where about 400 students and staff were located at the time , university spokesman Jesus Diaz told CNN + . Video from the scene showed fire engulfing part of the building and thick clouds of black smoke billowing over the campus . Authorities in Spain 's Basque province of Alava received a warning call at 9:50 a.m. in the name of ETA . Watch aftermath of the blast Â '' The warning call to the DYA emergency services in Alava said the car bomb would strike a university campus in the city of Vitoria about an hour after the phone call
MADRID , Spain -LRB- CNN -RRB- -- A car bomb exploded Thursday in a parking lot at the University of Navarra in Pamplona , Spain , sparking a massive fire , but `` luckily , '' no one was nearby and there were no deaths , Spain 's interior minister said . `` There could have been an enormous tragedy today at the University of Navarra , '' Interior Minister Alfredo Perez Rubalcaba said hours after the attack in a televised address . Hospital officials told CNN that 27 people suffered minor injuries , including one American woman and five other non-Spaniards . The Basque separatist group ETA is suspected to be behind the attack . The car , packed with an unknown quantity of explosives , was parked in a lot near the university 's library and detonated shortly after 11 a.m. local time -LRB- 6 a.m. ET -RRB- , Rubalcaba said . Watch witness describe the blast Â '' Campus authorities shut down the entire campus shortly after the blast to search for a possible second explosive device near the science building , about a half kilometer -LRB- .3 mile -RRB- from the car bombing , according to