The government of China offered unequivocal support on Tuesday for President Islam A. Karimov of Uzbekistan, who is facing international criticism for the crackdown against a prison break and antigovernment rally in the northeastern city of Andijon earlier this month. The support came amid fresh signs that the scale of violence exceeded what the Uzbek authorities have described, and as residents of Andijon and rights groups warned that roundups had begun inside Uzbekistan in an effort to squelch dissent. Full Story