Two family members reported missing early Monday morning have been found dead, and the third is believed to be deceased, Burnaby RCMP say.

Ming Dong Xu, 38, his 36-year-old wife Yu Ling Zhang and their four-year-old son, Garrick Xu, were reported missing by family when they failed to return home as expected.

Few details have been provided, but Mounties said the father and son's bodies were found Tuesday evening. The family vehicle was found submerged near Mitchell Island, with one of their bodies still inside.

Zhang has not yet been located, but police do not believe she survived. Crews were on scene searching for her body on and and in the water on Wednesday.

One of her friends wrote that Zhang was a "happy and positive lady. She is loved by every one of us."

The friend said she had a second child, a one-year-old daughter, who was not with the family at the time of their disappearance.

"We are very worried for the little one," the friend wrote.

It is early in the investigation, but they do not suspect foul play. They said the father was familiar with the area and worked nearby, which is what prompted a police search in the area in the first place.

The vehicle has been removed from the water and a mechanical inspection will be done to help determine what went wrong.

Anyone with more information is asked to reach out to police at 604-294-7922. Tips can be left anonymously through Crime Stoppers at 1-800-222-8477 (TIPS).

With files from CTV Vancouver's Breanna Karstens-Smith and David Molko