Police in North Herefordshire are appealing for witnesses to a collision last month.
It happened on Saturday 25 September shortly after 12.45pm on the B4204 in Upper Sapey.
Two people in their 70s were trapped in one vehicle, a Black Renault Megane, and were rescued by fire crews. They suffered serious injuries and were taken to hospital by ambulance for treatment, where they are in a serious but stable condition.
Three of the four people in the second vehicle, a silver Ford Kuga, also suffered serious injuries and remain in hospital.
Anyone who has any information is urged to call 101, quoting incident 343i of 25 September, 2021 or report it online.