A radical Muslim group warned the creators of South Park that they could face violent retribution for depicting the prophet Mohammed in a bear suit during last week's episode.
The website RevolutionMuslim.com has since been taken down, but a version showed the message to South Park creators Trey Parker and Matt Stone.
The article's author, Abu Talhah al Amrikee of New York, said the men "outright insulted" the religious leader.
The posting showed a gruesome picture of Theo Van Gogh, a Dutch filmmaker who was shot and stabbed to death in an Amsterdam street in 2004 by a fanatic angered by his film about Muslim women.
"We have to warn Matt and Trey that what they are doing is stupid and they will probably wind up like Theo Van Gogh for airing this show," Mr al Amrikee wrote. "This is not a threat, but a warning of the reality of what will likely happen to them."
The posting listed the addresses of Comedy Central's New York office and Parker and Stone's California production office. It also linked to a Huffington Post article that described a Colorado retreat owned by the two men.
CNN said the New York-based website is known for postings in support of Osama bin Laden and jihad, or holy war, against the West.
Mr al Amrikee said that the posting was made to raise awareness of the issue and to see that it does not happen again. Asked if Parker and Stone should feel threatened by it, he said "they should feel threatened by what they did".
Last week's episode, the 200th for the often-controversial cartoon, was intended to feature many of the personalities and groups that Parker and Stone had insulted during the series' run.
In 2006, Comedy Central banned the men from showing an image of Mohammed on their show. They had intended to comment on the controversy created by a Danish newspaper's publishing of caricatures of the Islamic leader. Muslims consider any physical representation of their prophet to be blasphemous.