Chinese officials initially suggested that any troubles journalists were having with Internet access probably stemmed from the sites themselves, not any steps that China had taken to filter Web content. But Sun Weide, the chief spokesman for the Beijing Olympic organizing committee, acknowledged Wednesday that journalists would not have uncensored Internet use. “It has been our policy to provide the media with convenient and sufficient access to the Internet,” Mr. Sun said. “I believe our policy will not affect reporters’ coverage of the Olympic Games.”

Mr. Sun said foreigners using the Internet in China would be subject to the same laws under which censors blocked access to a wide range of Web sites thought to be detrimental to stability. China has long maintained that its laws governing Internet access do not amount to censorship and are similar to restrictions on pornography or gambling sites in many countries.

The restrictions were the latest in a string of problems that have tarnished the prelude to the Olympics, which open Aug. 8. China struggled to contain ethnic unrest in Tibetan areas this spring. The global torch relay that China organized to promote the Games was disrupted by protests. Air pollution in Beijing has remained severe despite efforts to reduce it.

In recent months, human rights advocates have accused Beijing of stepping up the detention and surveillance of those it fears could disrupt the Games. On Tuesday, President Bush met with five Chinese dissidents at the White House to drive home his dissatisfaction with the pace of change. Mr. Bush, who will attend the opening ceremonies in just over a week, also pressed China’s foreign minister to ease political repression.

The White House also urged China to lift its restrictions on the Internet. “We want to see more access for reporters, we want to see more access for everybody in China to be able to have access to the Internet,” the White House press secretary, Dana Perino, said Wednesday.

On Capitol Hill, Senator Sam Brownback, Republican of Kansas, introduced a resolution on Tuesday urging China to reconsider what he said were its plans to force international hotel chains to track electronic communications by its guests. At a news conference, he introduced redacted documents that he said were provided by the hotels requiring them to install government software to monitor Internet traffic during the Olympics.

Concerns about media access to the Internet intensified Tuesday, when Western journalists working at the Main Press Center in Beijing said they could not get to Amnesty International’s Web site to see the group’s report on China’s rights record.