Police say a seven-year-old boy has died after the vehicle he was travelling in was rear-ended on Highway 401.

The accident happened on new Year's Day at about 5 p.m. near Dixie Road.

The seven-year-old child - who was one of four children and two adults in the van that was struck - was without any vital signs when rushed to hospital, according to emergency medical personnel.

All of the other family members were taken to hospital as a precaution. 

Police say the driver of the vehicle that drove into the family van fled the scene.