An investigation is underway after a large metal wheel drum struck a number of vehicles on the M23 near Gatwick Sunday evening.

A beige Volkswagen was the first to be hit on the southbound carriageway shortly after 5pm.  The collision caused a tyre to blow and the drum to smash through the central reservation and onto the northbound carriageway.

A black Volvo was then struck, followed by a black Audi.  The drum smashed through the windscreen causing minor injuries to the passenger.

All occupants were taken to East Surrey Hospital for treatment having been covered in glass.

Police are asking anyone with information to come forward.