The accident occurred early on Thursday when a driver of a Lada swerved into oncoming traffic and smashed into a Daewoo Nexia.
Three people, including the driver of the Daewoo Nexia and his four-month-old son, died instantly.
Four other people were taken to hospital suffering from serious injuries, but three of them later died. The fourth person, a woman, is in a critical condition in intensive care, the spokesman added.
An accident investigation is underway.