Authorities blamed religious extremists for yesterday’s suicide bomb and knife attack at a busy train station in Xinjiang. One of the two bombers was identified as Sedierding Shawuti, a Uighur. A spokesperson for the World Uyghur Congress said 100 Uighurs had been arrested following the attack. President Xi, who had been visiting the region at time of the bombing, called for “crushing blows against violent terrorist forces.”