Authorities have issued a call for witnesses to the collision on Jephson Road.
Following a motorbike accident, a 17-year-old teenager was evacuated to a hospital with critical injuries.
The collision occurred on Monday, just before 13:30 BST, according to the police, on Jephson Road in Sutton-in-Ashfield, Ashfield.
Another kid was admitted to the hospital by Nottinghamshire Police, although his injuries are not believed to be life-threatening or significantly changing.
Anyone who saw the collision has been requested to get in touch with the police as an investigation has started.