A man has been killed in a tragic accident at a construction site in St Albans.

The man was hit in the back of the head when the end of a concrete pump truck boom snapped off yesterday morning.

Police confirm a man was killed at a worksite on the corner of Cahill and Gratz streets just after 11.30am.

The man, aged in his 40s, died at the scene.

WorkSafe is investigating the death.

Press PLAY below for more with Neil Mitchell