Updated

Oklahoma City Police arrested a man on a terrorism charge Friday after he allegedly made a reference about beheading a female co-worker at a nursing home, OKCFox.com reported.

Jacob Muriithi, 30, allegedly told a woman on Sept. 13 that he was Muslim and affiliated with terror group ISIS. He was charged one day after another man in Oklahoma allegedly beheaded a co-worker.

"The threat precipitated from a piece of religious jewelry," police told the station. "It does appear to stem from [the victim's] ethnicity."

According to an incident report from OKC PD, the victim was wearing a star of David necklace. The unnamed woman works at the Bellevue Nursing Home in Oklahoma City and filed a report on Sept. 16, police said.

Muriithi, who is originally from Kenya, made a suggestion that he "was going to wait until she got off work and cut her head off" and then post it on Facebook, the station reported.

Muriithi told police during questioning that "he was joking."

Meanwhile, another man is accused of beheading a coworker in Oklahoma.