A young male pedestrian and a female motorbike pillion passenger have both died after separate collisions on Doncaster roads.
Doncaster Coroner Nicola Mundy is expected to open separate inquests this week, on a 20-year-old man who died the day after being hit by a car while crossing a country lane, and a woman who was riding pillion on a motorbike that came off the road near Thorne.
Neither of them has been identified officially so far.
South Yorkshire Police are appealing for witnesses to both incidents, which happened 12 hours apart on Saturday.
A Fiat Punto, driven by a 19-year-old Doncaster man in the direction of the A1, collided with the 20-year-old male pedestrian who is believed to have been crossing the carriageway on Hampole Balk Lane, Skellow, at 12.45am.
The pedestrian, from Carcroft, sustained serious head injuries and died the following day at the Northern General Hospital in Sheffield.
The driver of the Fiat did not sustain any injuries.
Then, just after noon on Saturday, a 64-year-old Doncaster woman died in a collision on the A614 near Thorne.
A maroon Suzuki 1100 motorcycle, ridden by a 56-year-old Doncaster man, is believed to have been travelling along Selby Road towards Thorne and junction six of the M18.
While negotiating a right-hand curve the Suzuki left the road and crashed.
The rider and the pillion passenger are believed to have come off the motorcycle and catapulted down an embankment into a field, while the bike returned to the centre of the carriageway.
The pillion passenger, who has not been named, was pronounced dead at the scene.
The rider sustained minor injuries.
Anyone who witnessed either incident, or anyone who has information that could assist officers, is asked to call South Yorkshire Police on 101 quoting incident number 63 or 571 of October 26.