An elderly woman died after her mobility scooter collided with a bus, police said.
The victim, in her 70s, was riding along Hollway Road in the Stockwood area of Bristol on July 19 when the crash happened shortly before 10am.
The pensioner was taken to Bristol Royal Infirmary, where she died later that day.
A spokesman for Avon and Somerset Police said: "We are keen to hear from anyone who may have information to help our inquiries.
"Anyone able to help is asked to contact the collision investigation unit on the force number 101."