State Highway 25A in the Coromandel is closed after a serious crash near Kopu.

A motorcyclist has been killed in a crash on the busy Kopu-Hikuai Road in the Coromandel Peninsula.

The crash involved the motorcycle and a car and happened at 3.45 on Saturday afternoon.

The section of road on SH25A was closed as police work at the scene but has reopened.

The Serious Crash Unit is investigating.