AURORA, Colo. (CBS4) – A mother crossing a street with her three children in Aurora was struck by a vehicle Monday evening.

The woman was crossing East Exposition Avenue from north to south when she was struck. She was holding her 2-year-old in her arms at the time. The woman and her child got pinned under the vehicle.

“Also present with the mother were her two twin boys, one of which was not struck and the other was bumped by the car,” Lt. Charles DeShazer said in a statement.

The vehicle stayed at the scene. An off-duty officer working at Walmart noticed the incident and called it in. He and the first two officers who arrived on the scene lifted the vehicle off the mother and child with the help of some good Samaritans.

The white vehicle that struck the family (credit: Glenn McReynolds)

The mother was transported to Aurora South Hospital and the children to The Children’s Hospital.

The woman has serious injuries but is expected to survive. The toddler has lacerations to her head and legs and will survive. One of the boys had a bump on his head and the other boy wasn’t injured.

DeShazer said the driver wasn’t speeding and the woman was not using the crosswalk. The driver won’t be charged.