Investigators say there were two people traveling in each vehicle, one of which was a 4-year-old girl.
A woman who witnessed the accident tried to help rescue an elderly woman who was trapped in one of the vehicles.
"The little girl had come out of the vehicle with her father, and I noticed that the lady was stuck, and they were trying to open the door. It was jammed so they couldn't open it at all," Christine Lafonde said.
The 4-year-old girl and an adult were taken to the hospital in serious condition.
This is a developing story and will be updated.