A five-year-old boy and his grandmother were among the four people killed in a Good Friday crash in Rhayader.
Dyfed-Powys Police is continuing to appeal for witnesses to a collision involving two vehicles happened on the A470, Rhayader to Llangurig road shortly after 11:40am on Friday.
Both those travelling in the silver Vauxhall Agila died at the scene. They have been named as 77-year-old Margaretta Jones and her grandson, five-year-old Ned Jones. They were from Capel Bangor, Aberystwyth.
Two passengers of a second car, a red Seat Leon also died at the scene. They were 86-year-old Vida Alford and 58-year-old Gillian Alford, both from Shropshire. A 57-year-old man, remains in hospital with serious injuries.
Specialist officers from Dyfed-Powys Police are supporting the families of all those involved and the coroner has been informed.
Anyone who saw either of these vehicles prior to the incident on Friday and has information which could assist with the ongoing investigation is asked to contact Dyfed-Powys Police on 101.