Beijing Olympic organisers insist they are providing full internet access to the media during the Games.
BOCOG spokesman Sun Weide says he's sure media did not have problems accessing the internet at the Games' Main Press Centre.
But in response to questions asked why media can't access some websites relating to the Falun Gong movement, he says it's an "evil cult" outlawed by the Chinese government.
Earlier Sun said that journalists would not be able to access information or websites connected to the Falun Gong spiritual movement.
Other sites were also unavailable to journalists, he said, without specifying which.
The International Olympic Committee is investigating the complaints of censorship.
Meanwhile Chinese officials are claiming their anti-pollution measures have helped dramatically improve the city's air quality.
The skies have become much clearer over Beijing after a day of strong winds.