An aggressive squirrel that’s gained nationwide attention this week for attacks on eight people in Novato is believed to be dead.

In past weeks, a gray fox squirrel has created havoc in the area of Sutro Avenue and Vineyard Road. The squirrel leapt from a tree and onto the head of a Pacific Gas and Electric Co. worker and bit and scratched a man in front of a home on Nov. 16. The attack came immediately after the squirrel assaulted a woman inside the residence. Two days later, the squirrel went after a teacher and student inside a classroom at Pleasant Valley Elementary School.

In what’s believed to be its final act of aggression, the squirrel was thrown to the ground by Richard Williams, 78, while he was in his garage. The squirrel, startled after the toss, ran off and has not been seen or heard from since, said Lisa Bloch, Marin Humane Society spokeswoman.

“All of the attacks have been within just a few days of each other,” Bloch said in a written statement. “However, since the victim of the last attack, which occurred on Nov. 27, indicated he injured the squirrel and there have not been any more attacks since, it’s quite possible the squirrel has died.”

Authorities are not letting down their guard, however. Fliers, warning residents of the squirrel and its hostile behavior, have been reposted, and those residing in the area are being asked to remain vigilant.

To report an encounter, call the Marin Humane Society at 415-883-4621.