What exactly happened in Tiananmen Square?

This is going to be a hard one to figure out, because the censors are swooping in, but to recap, a Jeep plowed into the area and killed five (injured 38) in the process. It's believed that the suspects are likely from the Uyghur ethnic group -- part of the Xianjiang province -- who are predominantly Muslim and may be having issues (read: are having issu…