This is the heart-stopping moment a vehicle rear-ends a truck carrying a nuclear weapon.

A video apparently showing a missile being transported in a convoy while helicopters fly overhead has been posted online.

The person who filmed the scene wrote: 'The crazy thing is that the Fed pulled over and was yelling and waving his hands that I can't record this video. And then a truck rear-ended the nuke.'

Heart-stopping: This is the moment the truck, which is apparently carrying a nuclear weapon, is rear-ended

Filmed: The video apparently shows a missile being transported in a convoy while helicopters fly overhead

As a vehicle pulls up with its sirens blaring on a US highway, the cameraman - referring to himself filming the convoy - can be heard saying: 'Are you f****** kidding, I can't do this? I can do it.'

A bang can then be heard as a truck drives into the back of the truck - which the onlooker claims contains a nuclear missile.

He wrote: 'Have you ever seen a nuclear missile being transported in a convoy? Several helicopters in the air and federal marshals leading the way.'

No damage appears to have been done to the truck believed to be carrying the weapon.

The video clip has been watched hundreds of thousands of times online.

The onlooker- referring to himself filming the convoy - can be heard saying: 'Are you f****** kidding, I can't do this?'