A baby was shot and killed by a toddler who got hold of a loaded gun while they were in a parked car and pulled the trigger, police said.

       The shooting occurred Monday in a parking lot near a medical center in San Antonio, Texas.

       Three children and a woman were in the vehicle, according to San Antonio Police Chief William McManus. The children -- ages 3, 2 and either 10 or 11 months -- were in the back of the vehicle, he said.

       One of the older children got hold of a loaded long gun that was in the very rear of the vehicle and "accidentally pulled the trigger," shooting the youngest child, the chief said.

       "What we have here today is a terrible, terrible tragedy," McManus said at a press briefing Monday.

       No additional details on the incident were released.

       The shooting remains under investigation.