DARIEN - Darien police say they're investigating a serious accident that sent three people to the hospital on Saturday night. 

Police say the accident happened on Hanson Road near Linda Lane around 9:30 p.m. Saturday. 

Officials say the car drove off the road, struck a stone wall and hit a tree. A 21-year-old passenger was ejected from the vehicle.

They say the passenger who was ejected is in stable condition, and the driver and a second passenger have since been released from the hospital. 

News 12 has been told the initial investigation found speed was a factor.