Petaluma police are searching for a man with a “baby face” who is suspected of robbing a bank Friday morning.

Just before 11 a.m., a man walked into the Umpqua Bank in the 200 block of Western Avenue and handed the teller a note, police said in a news release. The note stated the heist wasn’t a joke and demanded large bills, police said.

No weapon was seen during the incident, and the man was last spotted on foot headed south on Keller Street, police said. Officers arrived almost immediately but couldn’t find him.

Police described the suspect as a thin white man in his late teens or early 20s, with a clean-shaven “baby face” and blond hair. He was wearing a black hooded sweatshirt, black baseball hat with a white square emblem and black backpack.

Anyone with information on the suspect is asked to contact Sgt. Paul Gilman at 707-778-4415 or 707-778-4326.

You can reach Staff Writer Hannah Beausang at 707-521-5214 or hannah.beausang@pressdemocrat.com. On Twitter @hannahbeausang.