Spain's defense and health ministries say seven new cases of swine flu have been detected at a military academy outside Madrid. The new cases bring the total at the academy to 18.
The health ministry says on its Web site Sunday that none of those affected has needed hospital treatment. A further 81 people at the academy are under observation.
Defense Minister Carme Chacon on Friday ordered an investigation into how schoolchildren were allowed to visit Hoyo de Manzanares military engineering academy last week despite suspicions of the swine flu outbreak.
Around 500 cadets and staff at the academy have been ordered to remain indoors to avoid a possible spread of the virus.
There have been 133 cases of swine flu in Spain.