But they were shocked to see the source of the noise was not a car, but a bird! Watch the video to see how well the bird mimics the sound of a police siren.
The 38-year-old woman's car collided with an unmarked police car on the A20 in Eltham, south east London on Sunday ... Both police cars had their lights and sirens on as they raced at around ...
The police car was using blue lights and a siren at the time of the collision, which happened around 6.30pm on Sunday, Avon and Somerset Police said. The teenager was treated at the scene by ...