A riderless bike brought down a cyclist who was pedalling in front in India last week in a freak accident that killed two.

The accident in Kolkata on April 10, caught on a traffic CCTV camera, shows two bikes driven by four teenagers racing against each other.

They lose control, collide with each other, and all four riders are thrown off.

While one bike crashes to the ground, another carries on, under its own momentum, without the rider.

It crashed into a cyclist, who was riding ahead and brought him down.

While the lucky cyclist escaped without serious injuries, two teens, who were badly injured, succumbed to their injuries.

Officials identified the deceased as Sumit Biswas, 17, and Manai Das, 19, and a case has been registered at the Sinthee police Station.

A bike travelled on its own without a rider after a collision and brought down a cyclist who was pedalling ahead.

The incident in Kolkata, India, on April 10.

The serial accident caught on a traffic CCTV camera shows two bikes driven by four teenagers racing against each other.

They lose control, collide against each other, and all four riders are thrown off.

While one bike crashes to the ground, another carries on, under its own momentum, without the rider.

It crashed into a cyclist, who was riding ahead, and brought him down.

While the luck cyclist escaped without serious injuries, two teens, who were badly injured, succumbed to their injuries.

Officials identified the deceased as Sumit Biswas, 17, and Manai Das, 19, and a case has been registered at the Sinthee police Station.