SAN RAFAEL, Calif. (KRON) – A pair of businesses in Marin County has been facing backlash over COVID-19 restrictions. 

Notes have been left behind by someone threatening to burn the businesses down over their health rules. 

The threats have come as Marin County is experiencing a spike in COVID-19 cases. 

The owner of one of the threatened businesses says he understands the frustrations some people might have over COVID-19 restrictions but threatening arson is going way too far.

A menacing message was taped to the door of a San Rafael gym. It reads:

“If the vaccine mandate isn’t lifted within one week, this place burns”

Michael Jenkins is the owner of Body Kinetics Health Club. He says the threat was found at the business Sunday morning after someone stuck it on the door the night before.

Jenkins says he is not only concerned by the threat but confused by it. The club has been following the county’s current health guidance but there’s no vaccine mandate.

Just days before, a nasty handwritten note was found and a similar threat popped up at the Papermill Creek Saloon in Forest Knolls. 

Manager Jared Litwin says the bar has had a strict vaccination policy and recently warned customers on social media about positive COVID cases among some customers and musicians. 

Marin County overall has seen an uptick in cases post-Thanksgiving. As of Thursday, it’s the only Bay Area county under the CDC’s high transmission category. 

In response to the threats, more security measures will be taken at Jenkin’s Health Club. An outdoor camera and more floodlights will be installed. 

Both business owners hope people can understand these rules are meant to keep people safe.   

The saloon is offering a $1,000 reward for information leading to an arrest and a conviction of the suspect. 

Marin County deputies and San Rafael police are investigating.