Bus carrying Marine Corps Reserve unit overturned at Alabama military base . 23 Marines have been injured ; four critically , the military says . Score: 6 The accident happened Sunday morning , officials said .
Bus carrying Marine Corps Reserve unit overturned at Alabama military base . 23 Marines have been injured ; four critically , the military says . E Company , Anti-Terrorism Battalion , 4th Marine Division , was involved . The accident happened Sunday morning , officials said .