A former clerical worker at Fox has complained about Bill O’Reilly’s past behavior.

Bill O’Reilly’s position at Fox News grew increasingly tenuous on Tuesday as support from the Murdoch family showed signs of eroding, according to three people briefed on discussions about his future.

O’Reilly’s fate is expected to be discussed on Thursday at a board meeting for Fox News’ parent company, 21st Century Fox. Although O’Reilly brings enormous value to 21st Century Fox as a ratings draw, the Murdoch family, which controls the company, will have to weigh those considerations against its other ambitions. Those include overhauling a Fox News culture that has been damaged by repeated sexual harassment allegations and pursuing the acquisition of the British satellite company Sky, long coveted by the family patriarch, Rupert Murdoch.

The company must convince British regulators that it is fit to acquire the remaining 61 percent in Sky that it does not own.

Since a New York Times article this month detailed harassment allegations against O’Reilly, more than 50 companies have pulled their ads from his show.

O’Reilly, the No. 1 host in cable news, has been on vacation for a week in Italy and is planning to return to his show on Monday.

O’Reilly has received no indication Fox is planning to take him off the air, according to a person familiar with the matter. O’Reilly has denied the allegations against him.

The latest allegation against O’Reilly came on Tuesday when a woman who previously worked at Fox News called a 21st Century Fox hotline to report allegations of sexual and racial harassment against him, according to her lawyer, Lisa Bloom. The woman, who is not seeking money, wanted to stay anonymous, Bloom said.

Bloom said that the woman, who is AfricanAmerican, worked in a clerical position but did not work directly for O’Reilly. The woman reported that in 2008, O’Reilly would stop by her desk and grunt like a “wild boar.” He leered at her cleavage and legs and called her “hot chocolate,” Bloom said.

O’Reilly’s lawyer, Marc Kasowitz, rejected the allegations.