A pensioner has died after suffering a head injury when a bus she was travelling on was forced to brake suddenly.
The incident happened in St Helens, Merseyside, at lunchtime on Saturday.
Witnesses said a white van stopped suddenly in front of the 89 Arriva vehicle, causing the driver to slam on the brakes.
During the incident a 71-year-old woman sustained head injuries. She was taken to hospital in a critical condition and later died.
The van driver did not stop at the scene but has now been traced, police said.
The Liverpool Echo reported that passengers on the bus administered first aid to the woman before paramedics arrived at the scene.
Police confirmed on Monday that the woman had died.
A spokesperson for Merseyside Police said: "The female passenger has sadly passed away. Her next-of-kin have been informed.
"The driver of the van has now been traced and enquiries are ongoing.”
The spokesperson added: "Anyone who saw the incident is asked to DM @MerPolCC, call 101 or the Roads Policing Unit on 0151 777 5747 quoting log 438 of 22 February."