INCREDIBLE CCTV footage has shown the moment two police helicopters were completely destroyed when their rotor blades collided.

The horrifying accident happened at a California heliport as one police chopper was flying in and another was getting ready for takeoff, reports The Sun.

Police said six people were injured in the November 17 crash, including five officers aboard the helicopters plus someone on the ground.

None of the injuries were reported to be serious.

CCTV of the horrific smash was recently released showing the moments leading up the crash.

The Bell OH-58 helicopter is seen being pulled on to the pad while the pilot prepares for takeoff — but then a second chopper comes in to land.

The pilot in the second helicopter manoeuvres the aircraft on to the pad when its rotor blades strike the first helicopter’s blades.

The collision causes the rotor blades to rip apart and fly in different directions.

Both aircraft were destroyed, with debris strewn across the heliport.

Meanwhile a man who was standing on the pad at the time of the crash was knocked to the ground.

But footage showed him leaping up and dashing away from the wreckage towards safety as the pilots from both helicopters climb out of their severely smashed up helicopters.