At approximately 1:54 p.m., a Hispanic man between 20 and 30 years old, about 5 feet 8 inches and 180 pounds, walked into the bank at 301 N. McDowell Blvd. through the south entrance and exited through the west entrance, police said.
The suspect was last seen walking through the Plaza North Shopping Center.
No weapon or vehicle was seen, said the Petaluma PD.
He was reportedly wearing a striped black-and-grey beanie, grey hooded sweatshirt, jeans and white tennis shoes, police said.
Anyone who may have seen or recognizes this suspect is encouraged to call Detective Tami Shoemaker at 778-4372.