Officials are investigating the source of fliers depicting an Oakland Jewish councilwoman with a swastika over her face.

Libby Schaaf has been at the center of criticism from opponents in her California area to a proposed surveillance center.

Over the weekend, black and white fliers popped up around the Montclair district Schaaf represents, with the heading “Stop Schaaf” and “Stop the DAC,” a reference to the proposed center.

Jewish groups have already spoken out about the story, including the Simon Wiesenthal Center, which is headquartered in California.

“It is totally unacceptable to target Councilmember Schaaf because of the faith community to which she belongs,” said Rabbi Meyer H. May, executive director of the Wiesenthal Center.

“Because of its obscene significance, the use of a Nazi Swastika is ugly and profoundly offensive to the victims and survivors of the Holocaust, as well as people of goodwill everywhere. The Simon Wiesenthal Center shares the Councilmember’s outrage and urges law enforcement to find those responsible and prosecute them to the full extent of the law.”