Microsoft has blocked the site of a Chinese blogger critical of the government, raising sharp questions from its own employees over how far the company should go in abiding by restrictive laws used to curtail free speech and press in the communist country.

Zhao Jing's blog, formerly located on the MSN Spaces service, "has been blocked to help ensure the service complies with local laws in China," according to a statement issued in London by Waggener Edstrom, one of Microsoft's public relations agencies. His blog was at http://spaces.msn.com/members/mranti/.

It's not clear what triggered Microsoft's move, although Zhao, who also goes by the name Michael Anti, has a reputation for writing posts questioning government policy and commentaries on current news events. The sacking of his blog around the end of last year was noted Jan. 3 in a blog posting by Rebecca MacKinnon, a research fellow at Harvard Law School's Berkman Center for Internet and Society and former CNN journalist.

Some Western companies with IT operations in China have been criticized for tailoring their own policies in line with Chinese government laws considered to violate widely-accepted human rights standards. The rise of the Internet has represented a leaky crack for festering discontent, and the Chinese government is believed to have advanced Internet monitoring mechanisms in place detecting such keywords as "democracy" in online content.

In an interview with IDG News Service Wednesday at the Consumer Electronics Show in Las Vegas, Microsoft CEO Steve Ballmer reiterated that the company is bound to respect local law.

"We have an obligation in all the countries where we do business to abide by the laws and the government decrees in those countries," Ballmer said. "We do here, we do in Europe; we also do in places like China. And anybody can choose not to do business in any country. We all have that option."

Yahoo was criticized last year after providing evidence that led to a 10-year prison sentence for a Chinese journalist. Shi Tao was convicted of divulging state secrets to foreigners after passing along an e-mail that contained a warning from the Chinese government urging its officials to watch out for dissident activity ahead of the 15th anniversary of the Tiananmen Square massacre.

The IDG News Service is a Network World affiliate.