BENI, Congo (AP) — The United Nations mission in Congo will pursue the Allied Democratic Forces rebels who killed 14 peacekeepers earlier this month in the single deadliest attack on a peacekeeping mission in nearly 25 years, the U.N. said Tuesday. The Dec. 7 attack on a peacekeeping base also killed at least five Congolese soldiers. U.N. spokesman Stephane Dujarric said the U.N.'s official death toll is 14 peacekeepers dead and one missing, which has accounted for a shifting death toll.