A spokesperson for the Eureka, California Police Department Wednesday morning said a fire at a Catholic Church building has been ruled arson.

Investigators released a photo they say shows the person behind the September 10 attack at St. Bernard’s Church. The identity of the man in the photo remains a mystery as of 4:30 p.m. Wednesday.

A police department news release says damage caused by the arsonist is minor.  A motive for the arson is unknown.

The police spokesperson asked anyone with information about the fire to call Officer Dalby at 707-441-4060.