GUWAHATI, July 16: Sunday's massacre of 10 non- tribals in the hill district of Karbi Anglong was not unexpected, but there was little the police could do to avert it. It was the eighth massacre since April, and the third this month, and the total number of known victims now stands at 50. Almost all the victims were either Bihari, Nepali or Bengali. As in the earlier cases, Sunday's massacre too is attributed to the United People's Democratic Solidarity (UPDS), formed on May 22, 1999 by the merger of two earlier militant groups, the Karbi People's Front and the Karbi National Volunteers...