U.S. congressional leaders put anti-online piracy legislation on hold on Friday following a wave of protests led by Google and Wikipedia denouncing the bills as a threat to Internet freedom.

Senate majority leader Harry Reid said he was delaying next week's vote on the Protect IP Act (PIPA) and House Judiciary Committee chairman Lamar Smith said he would “revisit” the House version, the Stop Online Piracy Act (SOPA).

“In light of recent events, I have decided to postpone Tuesday's vote on the Protect IP Act,” Mr. Reid announced in a statement two days after a wave of online protests against the bill swept the Internet.

“There is no reason that the legitimate issues raised by many about this bill cannot be resolved,” the Democrat added. “I am optimistic that we can reach a compromise in the coming weeks.”

Mr. Smith, a Republican, said he would postpone consideration of the House bill in committee “until there is wider agreement on a solution.”

“I have heard from the critics and I take seriously their concerns regarding proposed legislation to address the problem of online piracy,” said Mr. Smith.

“It is clear that we need to revisit the approach on how best to address the problem of foreign thieves that steal and sell American inventions and products,” he said.

The announcements by Mr. Reid and Mr. Smith came amid eroding congressional support for the bills intended to crack down on online piracy of movies and music and the sale of counterfeit goods.

Wikipedia shut down the English-language version of its online encyclopedia for 24 hours on Wednesday to protest the legislation and hundreds of other sites joined in the protest.

Google blotted out the logo on its US home page with a black banner and published an exhortation to users to “Tell Congress: Please don't censor the Web!”

Google said more than seven million people in the United States had signed an online petition against the bills.

The draft legislation has won the backing of Hollywood, the music industry, entertainment giants like Rupert Murdoch's News Corp., the National Association of Manufacturers, the US Chamber of Commerce and others.

But the bills have come under fire from online companies and digital rights groups for allegedly paving the way for US authorities to shut down websites accused of online piracy, including foreign sites, without due process.

On Thursday, U.S. authorities shut down Megaupload.com, one of the world's largest file-sharing sites, and charged seven people in what they called one of “the largest criminal copyright cases ever brought by the United States.”

The shutdown of Megaupload triggered a wave of retaliatory attacks by the online hacktivist group Anonymous, which temporarily disabled the websites of the Justice Department, FBI and Recording Industry Association of America.

In his statement, Reid said “counterfeiting and piracy cost the American economy billions of dollars and thousands of jobs each year, with the movie industry alone supporting over 2.2 million jobs.

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