A motorcyclist was killed when he was forced off the road by an overtaking car in Hertfordshire on Monday night.
The man was riding a blue Triumph along Ridge Hill in Shenley near St Albans when the crash happened.
He was heading towards Colney Heath when one car travelling in the opposite direction was overtaken by another.
Hertfordshire Police, who are appealing for witnesses, say the car drivers may not have known that the crash happened.