Police are appealing for witnesses to a fatal collision on the B4351 between Clyro and Hay-on-Wye.
The incident occurred at around 8am on Wednesday, November 4.
The incident involved a silver Mini, which was in collision with the rear of a white Vauxhall van, which had stopped to assist with another collision.
The driver of the Mini, an 85-year-old female, died in hospital a few hours later.
If anyone has any information, or may have seen the Mini travelling along the B4351 at the relevant time, please contact the serious collision unit, quoting reference DPP-20201104-040.
This can be done online at https://www.dyfed-powys.police.uk/en/contact-us/report-an-incident/ by email: [email protected], by phone on 101 or by text: If you are deaf, hard of hearing, or speech impaired text the non-emergency number on 07811 311 908.