According to the sponsor of an ad, U. S. TV networks CBS and NBC rejected their ad urging Americans to oppose the building of a mosque two blocks from New York's Ground Zero.

Sponsored by the National Republican Trust political action group, the 60-second spot, mixes video and still images from the Sept. 11, 2001, attacks, including American Airlines Flight 11 hitting the World Trade Center and a man jumping from the building to his death, with sounds of Muslim prayer and images of presumed Muslim militants.

The spot's narrator says, "On Sept. 11, they declared war against us, and to celebrate that murder of 3,000 Americans, they want to build a monstrous 13-story mosque at Ground Zero."

The narrator says over images of the destroyed World Trade Center, "This ground is sacred."

He says, "Where we weep, they rejoice. That mosque is a monument to their victory and an invitation for more."

The ad's vague language, not its content, was why it was rejected, NBC Universal Inc. Advertising Standards Manager Jennifer Riley said in a letter.

She wrote, "An ad questioning the wisdom of building a mosque at Ground Zero would meet our issues of public controversy advertising criteria."

She further added, "However, this ad, which ambiguously defines 'they' as referenced in the spot, makes it unclear as to whether the reference is to terrorists or to the Islamic religious organization that is sponsoring the building of the mosque. Consequently, the ad is not acceptable under our guidelines for broadcast."

NRT Executive Director Scott Wheeler said that CBS Broadcasting Inc. also rejected the spot.

Politico quoted him as saying that the word "they," refers "to the people who are putting up the money with the intent of provoking us."

According to the Hollywood Reporter, Walt Disney Co.'s ABC and News Corp.'s Fox Broadcasting said that they didn't know if the ad had been submitted to their networks. (With Inputs from Agencies)