Ontario Provincial Police have released a video to try to identify two people they say could be witnesses in the unsolved murder of a central Ontario woman.

Sonia Varaschin of Orangeville, Ont., was reported missing on Aug. 30, 2010, after she failed to show up at work. Her body was found days later in a wooded area in nearby Caledon.

Police say it's believed the 42-year-old nurse was murdered in her home, about an hour northwest of Toronto, and have said her car and home were stained with blood.

They've released surveillance video of a gazebo in a park behind Orangeville's town hall — in an area close to where police say Varaschin's vehicle was left in the early morning hours of the day she disappeared.

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Sonia Varaschin was reported missing in late August, 2010, after failing to show up for work. ((OPP/Canadian Press))

The video depicts two people in a gazebo prior to them walking away at about 6 a.m. that day.

Police say the two are potential witnesses and not suspects in the case and are asking anyone who recognizes them to contact the force immediately so investigators can identify and speak with them.