At least 12 injured in bus crash at O'Hare International Airport

CHICAGO (KGO) -- At least 12 people are injured after a shuttle bus hit a concrete divider on a ramp heading toward O'Hare International Airport Friday morning.

Fire officials said four people were critically injured, six people were seriously injured, two people are in fair to serious condition and two people refused treatment at the scene.

Fire officials said 16 ambulances were sent to the scene.