Photo: Getty Images
The San Antonio Fire Department is reporting that Friday night's deadly explosion happened at an underground home. The blast killed four people and caused damage near K-Bar, a construction company on South Presa Street near the 410 Loop. The home was about 12 feet below the ground on a 75-acre site owned by a married couple and the husband's brother. Officials haven't said whether they were among the victims. A propane tank at the home is under investigation as a possible cause. Drug labs and bombs have been ruled out.