Two ambulances and two fire engines are at an Auckland building site where a construction worker has been injured by falling building material.

A worker said "a piece of clay" fell on the man on the site of a planned hotel and apartment tower on the corner of Albert St and Wyndham St.

The injured man is being lifted on a stretcher by a crane on the site and is being guided to a waiting ambulance.

The man is lying flat on the stretcher as medics prepare to lift him into the ambulance.

The man was hit by a piece of clay and is seriously injured. Photo / Dean Purcell