Again referring to the Southern Mongolian Human Rights Information Center:
Chinese authorities have declared martial law in major cities of the Mongolian region including Hohhot, Tongliao, Ulaanhad (Chifing in Chinese), and Dongsheng in the face of mass protests by students and herders. Tight Security has been imposed as the authorities attempt to quash any protest and unrest. The Southern Mongolian Human Rights Information Center (SMHRIC) received new photos from Hohhot, showing police and army troops deployed to exert control over possible protesters.
According to reliable sources, despite the tight security, on May 28, 2011, hundreds of Mongolian students and herders took to the streets of eastern Southern Mongolia’s Ulaanhad (Chi Feng) City to demand the rights of the Mongolian people be respected.
“Yes, Mongolian students took to the streets of Xincheng District of Ulaanhad yesterday,” a business person near the Ulaanhad Normal School, home to thousands of Mongolian students, said.
“Some Mongolian herders from fairly long distances also joined the protest,” a Mongolian physician who asked not to be identified told SMHIRC, “but the protestors were dispersed shortly by riot police and army.”
Riot police and army troops have been dispatched to Tongliao Municipality (former Jirim League), home to the largest Mongolian population (1.5 million), where all Mongolian schools and colleges are now under heavy guard.
According to the Washington Post, the Communist Party chief of Inner Mongolia has been taking the (very) unusual step of actively getting out there and trying to assuage their concerns. I’d assume that the arrival of riot police means that they won’t be able to coordinate many more large-scale protests, so unless something drastic happens I think it’ll probably start to peter out now.