Police are still yet to work out how an Oamaru man died over the weekend.

Wayne Ross, 46, was found dead at a commercial premise on Arum Street on Saturday.

Police say they've completed a post mortem examination, but they haven't yet worked out the cause of his death.

Police are asking anyone who may have seen the father of three between him leaving a Towey Street address on Friday night and the discovery of his body on Saturday to contact them.