Emergency services were called to reports of a collision on B600 Moorgreen near to the junction of Engine Lane, Newthorpe involving a car and two pedestrians.
Officers attended the scene following the incident, which happened just before 2.30pm on Sunday (26 December 2021).
Officers investigating are now appealing for anyone who witnessed the incident.
Detective Constable Emma Temple, from Nottinghamshire Police’s Serious Collision Investigation Unit, said: “Two women remain in hospital with serious injuries following this incident and we are committed in our efforts to investigate the circumstances around this.
“We have been conducting a number of enquiries and would now appeal to anyone who witnessed the incident or anyone with dashcam footage to get in touch on 101, quoting incident 252 of 26 December 2021.”