Killings in Adams Morgan and Columbia Heights this week appear gang-related, according to a D.C. councilmember who is concerned the violence will spur more attacks and end a year of relative peace among the young people in his ward.

A 14-year-old boy was fatally stabbed Friday afternoon near 14th and Newton Streets NW, in what appeared to be part of a running brawl in the Columbia Heights neighborhood. The killing happened less than a mile from, and 48 hours after, the shooting of a 21-year-old black male who was killed near an Adams Morgan playground at 18th and Kalorama Streets, NW.