An 11-year-old boy was airlifted to hospital after colliding with a car while on a bike.
A doctor and a paramedic were flown to the scene where the boy was treated for serious head injuries.
He was airlifted to the Royal Victoria Infirmary in Newcastle, where his condition on arrival was critical.
A 49-year-old man has been arrested in connection with the incident.
More top news
Doctors from the North East joined thousands of junior doctors as they staged a "masked march" protest over pay and conditions.
Substitute Adam Johnson's free-kick somehow beat Simon Mignolet at his near post before Defoe equalised at the death.
Aleksandar Mitrovic's fifth goal of the season dragged Newcastle out of the Premier League relegation zone.