The News Room understands that motor car, PAE 3091 was heading south along the access road when the driver reportedly lost control of the vehicle.
Before coming to a halt, the car ploughed through the trio and landed in a nearby drain.
The injured adolescents were all taken to the Georgetown Public Hospital in an unconscious state and admitted in as critical patients.
Khemraj succumbed to her injuries around 15:00hrs. The two others remain hospitalised.
The driver, 20-year-old Navindra Narine, a businessman of Enmore Hope East was arrested.
He was subject to a breathalyser test which confirmed he was under the influence of alcohol.