An investigation by Sarnia police into the death of a 28-year-old woman in the city's south end has found it was not suspicious.

Police, EMS, and fire and rescue crews attended a call regarding an unresponsive female at an address in the 200 block of Devine Street around 8:30 p.m. on Sept. 3.

Diana Lynn Gray was pronounced dead at the scene and a post mortem was conducted in Toronto.

The death was eventually determined to be the result of natural causes.