US comedian Bill Cosby has been told another project he was due to take part in has been cancelled.
NBC was working on a sitcom involving the veteran entertainer, which the network says is "no longer in development".
Earlier, Netflix announced it had terminated a separate project after historical sexual assault allegations against the star resurfaced.
His lawyer has described the claims as "discredited".
In a brief statement, NBC said of their proposed sitcom:
"We can confirm that the Cosby project is no longer in development."
The sitcom was said to have been in its early stages, with no script or production date finalised.
Cosby's comedy special on Netflix has meanwhile been postponed amid claims about the 77-year-old comedian, known as America's TV dad.
The video-streaming company said on Tuesday night the premiere of Bill Cosby 77 would not air later this month, but did not say why or when it may debut.
Fifteen women have made complaints, six of whom have identified themselves publicly.
Model and TV personality Janice Dickinson is the latest accuser.
In an interview on Tuesday night, she alleged the entertainer assaulted her after a 1982 dinner in Lake Tahoe, California.
The comedian's lawyer, Martin Singer, said in a statement to Sky News the 59-year-old's claim is a "lie".
Dickinson said she wrote about the alleged assault in her 2002 autobiography, but that Cosby and his lawyers pressured her and the publisher to remove the details.
However, according to Cosby's lawyer, Dickinson's publisher Harper Collins has said she was under no pressure not to write about the comedian.
"The only story she gave 12 years ago to the media and in her autobiography was that she refused to sleep with Mr Cosby and he blew her off," Mr Singer added.
Earlier this week, the comedian postponed an interview on Queen Latifah's daytime talk show and confirmed that he would not be making a scheduled appearance on the Late Show With David Letterman.
Cosby, who has never been criminally charged in any case, settled a civil suit in 2006 with another woman, Andrea Constand, over an alleged incident two years before.
But in recent weeks a fellow comic, Hannibal Buress, called Cosby a "rapist" during a Philadelphia performance.
Among Cosby's other accusers is former aspiring actress Barbara Bowman, who says the comic assaulted her on multiple occasions in 1985, when she was 17.
Publicist and former actress Joan Tarshis came forward on Sunday to allege that Cosby raped her twice when she was 19.
Cosby has remained silent throughout, but the scandal is threatening to derail his comeback bid.
He has dozens of performances scheduled throughout the US and Canada until May next year.
The entertainer is due to perform on Friday in a sold-out show in Melbourne, Florida, and next week in Las Vegas.
Cosby is best known for playing Cliff Huxtable on The Cosby Show, a ratings-topping TV sitcom that ran from 1984-92.