SAN RAFAEL, Calif. (KRON) – Several residents of San Rafael, California, say aggressive squirrels are terrorizing the neighborhood, sometimes leaving victims with nasty bites or scratches.

“I was just walking along, and suddenly, there’s a squirrel attached to my thigh. Just clomped on to my thigh,” Joan Heblack, who lives in the Lucas Valley neighborhood, told NewsNation’s affiliate KRON. “I look down and I was like, ‘What is that?’ I said, ‘Get off, get off!’ I was trying to brush him off. And he was just clinging more and biting.”

A few doors down from Heblack, another resident said her husband was attacked by a squirrel when he tried to stop it from biting into his wooden fence on Friday. “She took a big chunk of the wood and we thought, ‘Oh my gosh, she’s hungry or something,'” Marie Ayoob told KRON. “Joe, my husband, took off his cap and hit it so it could go away. Well, she turned around and just jumped on his head.”

Flyers now appear across the neighborhood warning about the squirrel attacks, as well as the potential injuries the animals can cause with their teeth and claws. (“Several have gone to the ER” for severe lacerations, a message on the flyer alleges.) The posters describe the offending animal as “a very mean squirrel” that “comes out of nowhere. “This is not a joke,” the posters warn.