PARIS (Reuters) - Armed police were sent into a suburb of Dijon in eastern France to restore order after score-settling between rival -- Trouble erupted on Friday when some 100 Chechen youths from across France descended on the Dijon suburb of Gresilles to avenge an attack on a Chechen teenager earlier in the week, police officials said. -- wearing balaclavas and brandishing handguns or knives, out in the streets of the Dijon suburb.