Sun Weide, a media official with the Beijing Organizing Committee of the 29th Olympic Games (BOCOG), made the remarks at a press conference this morning when he was asked about the attack on a border armed police division in northwest China's Xinjiang Uygur Autonomous Region.

"We are not clear about (the event), (and we) need to check the facts with the police in Xinjiang," he said at the press conference.

The Chinese government and the BOCOG have paid great attention to the security of the Beijing Games, Sun said at the press conference.

"An effective command system has been established, and we have strengthened cooperation in security work, including information exchange and the combat against terrorism, with other countries especially those which hosted the Games before," Sun said.

"We have strengthened security in all Olympic venues and in the Olympic village. We are well-prepared to deal with any kinds of threats," Sun added.

"We have not obtained further information about the incident," Sun told Xinhua over the telephone this afternoon.

The attack left 16 policemen killed and 16 others injured in Kashi of Xinjiang when they were jogging outside the police division in a morning exercise.