A 16-year-old boy pedestrian has been killed and an 18-year-old male cyclist seriously injured in an horrific hit and run incident.

The teenage pedestrian was struck by a speeding grey Audi shortly after it clipped an 18-year-old cyclist propelling him into a hedge in Sheffield, South Yorkshire, yesterday afternoon.

CCTV footage from the scene at Staniforth Road in the city show the driver of a grey Audi car driving on the wrong side of the road before swerving in to and hitting the electric bike rider.

The vehicle then crashed in to a pedestrian walking on the pavement who was seen flying through the air.

He was taken to hospital but died from his injuries.

The driver failed to stop at the scene, with heavy damage to the front right of their vehicle.

Last night, police said a man and a woman in their forties have been arrested on suspicion of assisting an offender as part of an investigation.

The force said it could not confirm if the driver had yet been arrested.

South Yorkshire Police's detective chief inspector Andy Knowles said: "We know that this incident will have caused significant concern in the local community, and tonight our thoughts are with the boys loved ones following this tragic incident."

"Our investigation into what happened is continuing at pace and we currently have a scene in place on Staniforth Road as we continue to piece together the circumstances."

"We are aware of speculation being shared online, as well as footage of the incident, and we ask members of the public to withhold from speculating or sharing footage which may cause distress to the boy's family. "

"If you have any footage, imagery or information that may assist our investigation then please share this with us – it may form an important part of our investigation." ."