The incident took place around 8:15 a.m. Wednesday on Main Street near Pinehurst Street in Trumbull, said Trumbull Police Capt. Keith Golding.
The Middlebrook School student had run out into the road and into the path of a southbound vehicle as she was trying to catch her school bus that had stopped on Pinehurst Street, Golding said.
She was struck by a vehicle that was traveling on Main Street, as it drove around a Greater Bridgeport Transit bus that had also stopped for passengers at the same location, he added.
Trumbull EMS transported the student to Bridgeport Hospital where she is being treated for a leg injury.
All vehicles and drivers remained at the scene and are cooperating with the investigation.
No charges have yet been filed, but the investigation continues.
Click here to follow Daily Voice Newtown and receive free news updates.