A female paramedic has died after an ambulance and a cement truck collided.
Two other paramedics were taken to hospital after the crash on the A21 near Tonbridge, Kent, on Wednesday night.
The lorry driver suffered minor injuries, a spokesperson for South East Coast Ambulance Service NHS Foundation Trust said.
The ambulance was on its way to an incident at the time of the crash, the trust confirmed.
A male paramedic suffered serious injuries and a student sustained a head injury.
Emma Williams, executive director of operations at the South East Coast Ambulance Service, said: “We are deeply saddened by the loss of our colleague and our heart-felt sympathies go to her family, friends and colleagues at this very difficult time.
“Our thoughts are also with the other injured staff members as well as all of those who responded to the incident.
“We are supporting the police in their enquiries and would urge anyone who may have witnessed the incident to contact them.”
The ambulance was not transporting a patient at the time of the crash.
Emergency services rushed to the location of the collision, including an air ambulance, but the female paramedic died at the scene.
The male paramedic with multiple serious injuries was airlifted to Kings College Hospital in London while the student paramedic, who was travelling in the rear of the vehicle, was taken to hospital with a head injury.
Kent Police are investigating and have appealed for dashcam footage and witnesses.