Update at 11:38 a.m. PST, with comment from Hulu.
Hulu.com has pulled its content off CBS-owned TV.com, which relaunched last month, Hulu confirmed Wednesday.
(Disclosure: CNET News is published by CBS Interactive, a unit of CBS.)
Attempts to access episodes of Heroes and other content from NBC and News Corp. partners in the Hulu joint venture, displayed a "video unavailable" message.
In a statement, Hulu said:
Hulu has contractual rights with regards to our relationship with TV.com and we are exercising those rights. Out of respect for their confidentiality, we will not disclose our discussions.
A CBS spokeswoman said the company had no comment.
TV.com saw a 263 percent increase in unique viewers in January after it redesigned and expanded the site and added user interaction features, according to Nielsen VideoCensus figures cited by MediaPost Online. It has 5.9 million unique visitors compared with Hulu's 4.5 million, according to Nielsen figures reported by Advertising Age.