Saskatoon police say they are going through the cellphone records and banking history of a missing Indigenous woman to find out what happened to her and her son.

Police say Dawn Walker, who is 48, and her seven-year-old son, Vincent Jansen, have been missing for 11 days.

Police say she was last seen at a business in Saskatoon on July 22, with her truck and personal belongings later found at Chief Whitecap Park, near the South Saskatchewan River, just south of the city.

Sgt. Grant Obst says her cellphone has not been found, but investigators have her phone records.

He declined to comment whether there is a person of interest in the case, but says police are speaking with those who previously had contact with her.

RCMP are also involved in the search, focusing their investigation on the South Saskatchewan River.