The Bush administration has approved the export of sensitive equipment and expertise to China’s military and police forces to bolster security at the Beijing Olympics, according to a number of private and public interviews and documents.

The support includes security and military equipment that is restricted for export under the Export Administration Act, prompting some critics of the policy to question its legality.

The FBI and other U.S. security agencies also are helping China to develop sensitive counterterrorism coordination techniques, such as creating joint security operations and intelligence centers, according to Bush administration defense and national security officials.

The officials said U.S. support to the Beijing Olympics is modeled on the security plan and federal assistance used for the 2002 Salt Lake City Winter Olympics. The techniques can be used for surveillance of protesters, including Tibetans, they said.