A US group that monitors extremist Web sites says that a Chinese Islamic group has posted a new video that shows a burning Olympics logo and an explosion over a venue for the Beijing Games. The video, reported Thursday by the IntelCenter, follows the posting of a similar video dated July 23. Both are attributed to the Turkistan Islamic Party, which experts say is an offshoot of a secessionist group from China's Central Asian frontier with ties to al-Qaida. IntelCenter said the latest video was dated Aug. 1 and features "graphics showing a burning Olympics logo and an explosion imposed over one of the venues." Comments on the video were in the language of the Uighurs, a Muslim minority in western China with a long history of tense relations with the central government. No translation was immediately available.