BOGOTA, Colombia — At least nine people were killed and dozens more injured in a car bombing at a heavily guarded police academy in Colombia’s capital on Thursday, recalling the high-profile attacks seen during the bloodiest chapters of the country’s drug-fueled guerrilla conflict. The scene outside the General Santander police academy in southern Bogota was chaotic in the immediate aftermath of the midmorning attack, the biggest against a police or military facility in the capital in years. Videos circulating on social media show panicked police officers carrying injured colleagues on stretchers along a road strewn with debris and body parts.