(St. Paul, OR) -- Police, family and friends are stepping up the search for a prominent St. Paul business owner who has been missing for 11 days. Oregon State Police have now joined Yamhill County Sheriff's deputies, searching for 48-year-old Gurjinder Singh Grewal. The owner of the St. Paul Market was last seen February 8th, walking on the Willamette River Bridge around 10 a.m. His car was found later on the south side of the bridge, near Highway 219, between St. Paul and Newberg. Grewal was last seen wearing gray sweatpants, a black hoodie and a Chicago Bulls hat. Drivers with dash-cam footage or who saw him in the area on February 8th, should contact the Oregon State Police.